Ibn `Abbas said, `The Appointed Days are the Days of Tashriq (11-12-13th of Dhul-Hijjah) while the Known Days are the (first) ten (days of Dhul-Hijjah).'' `Ikrimah said that:
﴿ وَٱذۡكُرُواْ ٱللَّهَ فِىٓ أَيَّامٍ۬ مَّعۡدُودَٲتٍ۬ۚ ﴾
(And remember Allah during the Appointed Days.) means reciting the Takbir - Allahu Akbar, Allahu Akbar, during the days of Tashriq after the compulsory prayers.
Imam Ahmad reported that `Uqbah bin `Amr said that Allah's Messenger said:
« يَوْمُ عَرَفَةَ، وَيَوْمُ النَّحْرِ، وَأَيَّامُ التَّشْرِيقِ، عِيدُنَا أَهْلَ الْإسْلَامِ، وَهِيَ أَيَّامُ أَكْلٍ وَشُرْب »
(The day of `Arafah (9th of Dhul-Hijjah), the day of the Sacrifice (10th) and the days of the Tashriq (11-12-13th) are our `Id (festival) for we people of Islam. These are days of eating and drinking.)
Imam Ahmad reported that Nubayshah Al-Hudhali said that Allah's Messenger said:
« أَيَّامُ التَّشْرِيقِ أَيَّامُ أَكْلٍ وشُرْبٍ وَذِكْرِ الله »
(The days of Tashriq are days of eating, drinking and Dhikr (remembering) of Allah.)
Muslim also recorded this Haith
We also mentioned the Hadith of Jubayr bin Mut`im:
« عَرَفَةُ كُلُّهَا مَوْقِفٌ، وَأيَّامُ التَّشْرِيقِ كُلُّهَا ذَبْح »
(All of `Arafat is a standing place and all of the days of Tashriq are days of Sacrifice.)
We also mentioned the Hadith by `Abdur-Rahman bin Ya`mar Ad-Diyli:
« وَأَيَّامُ مِنىً ثَلَاثَةٌ فَمَنْ تَعَجَّلَ فِي يَوْمَيْنِ فَلَا إثْمَ عَلَيْهِ وَمَنْ تَأَخَّرَ فَلَا إِثْمَ عَلَيْه »
(The days of Mina (Tashriq) are three. Those who hasten in two days then there is no sin in it, and those who delay (i.e., remain in Mina for a third day) then there is no sin in it.)
Ibn Jarir reported that Abu Hurayrah narrated that Allah's Messenger said:
« أَيَّامُ التَّشْرِيقِ أيَّامُ طُعْمٍ وَذِكْرِ الله »
(The days of Tashriq are days of eating and remembering Allah.)
Ibn Jarir reported that Abu Hurayrah narrated that Allah's Messenger sent `Abdullah bin Hudhafah to Mina proclaiming:
« لَا تَصُومُوا هذِه الْأَيَّامَ، فَإنَّهَا أَيَّامُ أَكْلٍ وَشُرْبٍ وَذِكْرِ اللهِ عَزَّ وَجَل »
(Do not fast these days (i.e., Tashriq days), for they are days of eating, drinking and remembering Allah the Exalted and Most Honored.)