Allah the Exalted states that since He sent Nuh, peace be upon him, all the 
Prophets and Messengers He sent after that were from his offspring. All the 
revealed Divine Books and all the Messengers that received revelation after 
Ibrahim, Allah's Khalil, peace be upon him, were from Ibrahim's offspring. Allah 
the Exalted said in another Ayah:
[وَجَعَلْنَا فِى 
ذُرِّيَّتِهِ النُّبُوَّةَ وَالْكِتَـبَ]
(and placed in their offspring prophethood and Scripture.) [29:27] The last 
among the Prophets of the Children of Israel was `Isa, son of Mary, who 
prophecied the good news of the coming of Muhammad, peace and blessings be upon 
them both. Allah the Exalted said,
[ثُمَّ قَفَّيْنَا 
عَلَى ءَاثَـرِهِم بِرُسُلِنَا وَقَفَّيْنَا بِعِيسَى ابْنِ مَرْيَمَ 
وَءَاتَيْنَـهُ الإِنجِيلَ]
(Then, We sent after them Our Messengers, and We sent 'Isa the son of Maryam, 
and gave him the Injil.) refering to the Injil that Allah revealed to him,
[وَجَعَلْنَا فِى 
قُلُوبِ الَّذِينَ اتَّبَعُوهُ]
(And We ordained in the hearts of those who followed him,) i.e., the 
disciples,
[رَأْفَةٌ]
(compassion) and tenderness,
[وَرَحْمَةً]
(and mercy.) toward the creatures. Allah's statement,
[وَرَهْبَانِيَّةً 
ابتَدَعُوهَا]
(But the monasticism which they invented for themselves,) refers to the 
monasticism that the Christian nation invented,
[مَا كَتَبْنَـهَا 
عَلَيْهِمْ]
(We did not prescribe for them) `We -- Allah -- did not ordain it for them, 
but they chose it on their own.' There are two opinions about the meaning of,
[إِلاَّ ابْتِغَآءَ 
رِضْوَنِ اللَّهِ]
(only to please Allah therewith,) The first is that they wanted to please 
Allah by inventing monasticism. Sa`id bin Jubayr and Qatadah said this. The 
second meaning is: "We did not ordain them to practice that but, rather, We 
ordained them only to seek what pleases Allah.'' Allah's statement,
[فَمَا رَعَوْهَا 
حَقَّ رِعَايَتِهَا]
(but that they did not observe it with the right observance.) meaning, they 
did not abide by what they ordered themselves to do. This Ayah criticizes them 
in two ways: first, they invented in things in their religion, things which 
Allah did not legislate for them. The second is that they did not fulfill the 
requirements of what they themselves invented and which they claimed was a means 
of drawing near to Allah, the Exalted and Most Honored. GIbn Jarir and Abu 
`Abdur-Rahman An-Nasa'i -- and this is his wording - recorded that Ibn `Abbas 
said, "There were kings after `Isa who changed the Tawrah and the Injil when 
there were still believers who recited Tawrah and the Injil. Their kings were 
told, `We were never confronted by more severe criticism and abuse than of these 
people.' -- they recite the Ayah,
[وَمَن لَّمْ يَحْكُم 
بِمَآ أَنزَلَ اللَّهُ فَأُوْلَـئِكَ هُمُ الْكَـفِرُونَ]
(And whosoever does not judge by what Allah has revealed, such are the 
disbelievers.)(5:44), as well as, they accuse us of short comings in our 
actions, while still they recite. Therefore, summon them and let them recite 
these Ayat our way and believe in them our way.' The king summoned them and 
gathered them and threatened them with death if they did not revert from 
reciting the original Tawrah and Injil to using the corrupted version only. They 
said, `Why do you want us to do that, let us be.' Some of them said, `Build a 
narrow elevated tower for us and let us ascend it, and then give us the means to 
elevate food and drink to us. This way, you will save yourselves from hearing 
us.' Another group among them said, `Let us go about in the land and eat and 
drink like beasts do, and if you find us in your own land, then kill us.' 
Another group among them said, `Build homes (monasteries) for us in the deserts 
and secluded areas, where we can dig wells and plant vegetables. Then, we will 
not refute you and will not even pass by you.' These groups said this, even 
though they all had supporters among their tribes. It is about this that Allah 
the Exalted and Most Honored sent down this Ayah,
[وَرَهْبَانِيَّةً 
ابتَدَعُوهَا مَا كَتَبْنَـهَا عَلَيْهِمْ إِلاَّ ابْتِغَآءَ رِضْوَنِ اللَّهِ 
فَمَا رَعَوْهَا حَقَّ رِعَايَتِهَا]
(But the monasticism which they invented for themselves, We did not prescribe 
for them, but (they sought it) only to please Allah therewith, but that they did 
not observe it with the right observance.) ''' Imam Ahmad recorded that Anas bin 
Malik said that the Prophet said,
«لِكُلِّ نَبِيَ 
رَهْبَانِيَّةٌ، وَرَهْبَانِيَّةُ هذِهِ الْأُمَّةِ الْجِهَادُ فِي سَبِيلِ اللهِ 
عَزَّ وَجَل»
(Every Prophet has Rahbaniyyah (monasticism); Jihad in the cause of Allah, 
the Exalted and Most Honored, is the Rahbaniyyah of this Ummah.) Al-Hafiz Abu 
Ya`la collected this Hadith and in this narration, the Prophet said,
«لِكُلِّ أُمَّةٍ 
رَهْبَانِيَّةٌ، وَرَهْبَانِيَّةُ هذِهِ الْأُمَّةِ الْجِهَادُ فِي سَبِيلِ 
الله»
(Every Ummah has Rahbaniyyah; Jihad in the cause of Allah is the Rahbaniyyah 
of this Ummah.) Imam Ahmad recorded that Abu Sa`id Al-Khudri said that a man 
came to him and asked him for advice, and Abu Sa`id said that he asked the same 
of Allah's Messenger . Abu Sa`id said, "So, I advise you to adhere by the Taqwa 
of Allah, because it is the chief of all matters. Fulfill the obligation of 
Jihad, because it is the Rahbaniyyah of Islam. Take care of remembering Allah 
and reciting the Qur'an, because it is your closeness (or status) in the heavens 
and your good fame on earth.'' Only Imam Ahmad collected this Hadith.
[يأَيُّهَا الَّذِينَ 
ءَامَنُواْ اتَّقُواْ اللَّهَ وَءَامِنُواْ بِرَسُولِهِ يُؤْتِكُمْ كِفْلَيْنِ مِن 
رَّحْمَتِهِ وَيَجْعَل لَّكُمْ نُوراً تَمْشُونَ بِهِ وَيَغْفِرْ لَكُمْ وَاللَّهُ 
غَفُورٌ رَّحِيمٌ - لِّئَلاَّ يَعْلَمَ أَهْلُ الْكِتَـبِ أَلاَّ يَقْدِرُونَ عَلَى 
شَىْءٍ مِّن فَضْلِ اللَّهِ وَأَنَّ الْفَضْلَ بِيَدِ اللَّهِ يُؤْتِيهِ مَن 
يَشَآءُ وَاللَّهُ ذُو الْفَضْلِ الْعَظِيمِ ]
(28. O you who believe! Have Taqwa of Allah, and believe in His Messenger, He 
will give you a double portion of His mercy, and He will give you a light by 
which you shall walk (straight). And He will forgive you. And Allah is 
Oft-Forgiving, Most Merciful.) (29. So that the People of the Scriptures may 
know that they have no power whatsoever over the grace of Allah, and that (His) 
grace is in His Hand to bestow it on whomsoever He wills. And Allah is the Owner 
of great bounty.)