Sahih Muslim 2604
Sahih Muslim · Book 45: The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship · Whomever Is Cursed, Reviled Or Prayed Against By The Prophet (SAW) When He Does Not Deserve That, It Will Be Purification, Reward And Mercy For Him
حَدَّثَنِي إِسْحَاقُ بْنُ مَنْصُورٍ ، أَخْبَرَنَا النَّضْرُ بْنُ شُمَيْلٍ ، حَدَّثَنَا شُعْبَةُ ، أَخْبَرَنَا أَبُو حَمْزَةَ سَمِعْتُ ابْنَ عَبَّاسٍ ، يَقُولُ كُنْتُ أَلْعَبُ مَعَ الصِّبْيَانِ فَجَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَاخْتَبَأْتُ مِنْهُ . فَذَكَرَ بِمِثْلِهِ .
This hadith has been transmitted on the authority of Ibn Abbas with a slight variation of wording.