عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ: ((كُتِبَ عَلَيَّ النَّحْرُ وَلَمْ يُكْتَبْ عَلَيْكُمْ، وَأُمِرْتُ بِرَكْعَتَيِ الضُّحَى وَلَمْ تُؤْمَرُوا بِهَا)) (مسند أحمد: 2917)
It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The (Eid al-Adha) sacrifice has been made obligatory upon me, but it has not been made obligatory upon you, and I have been commanded to perform two units of Duha prayer, whereas you have not been commanded to do so.