Superiority of deeds on the days of Tashriq

وَقَالَ ابْنُ عَبَّاسٍ وَاذْكُرُوا اللَّهَ فِي أَيَّامٍ مَعْلُومَاتٍ أَيَّامُ الْعَشْرِ، وَالأَيَّامُ الْمَعْدُودَاتُ أَيَّامُ التَّشْرِيقِ. وَكَانَ ابْنُ عُمَرَ وَأَبُو هُرَيْرَةَ يَخْرُجَانِ إِلَى السُّوقِ فِي أَيَّامِ الْعَشْرِ يُكَبِّرَانِ، وَيُكَبِّرُ النَّاسُ بِتَكْبِيرِهِمَا. وَكَبَّرَ مُحَمَّدُ بْنُ عَلِيٍّ خَلْفَ النَّافِلَةِ.Ibn 'Abbas said, "Remember Allah during the well-known days; i.e., the first ten days of Dhul-Hijjah, and also the fixed number of appointed days; i.e. the days of Tashriq." Ibn 'Umar and Abu Hurairah used to go out to the market saying Takbir during the first ten days of Dhul-Hijjah and the people would say Takbir after their Takbirs. Muhammad bin 'Ali used to say Takbir after Nawafil. ​​