Sahih Muslim · Hadith 6523
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet - كتاب فضائل الصحابة رضى الله تعالى عنهم
حدثنا زهير بن حرب، وأبو بكر بن النضر قالا حدثنا هاشم بن القاسم، حدثنا ورقاء بن عمر اليشكري، قال سمعت عبيد الله بن أبي يزيد، يحدث عن ابن عباس، أنوسلم أتى الخلاء فوضعت له وضوءا فلما خرج قال " من وضع هذا " . في رواية زهير قالوا . وفي رواية أبي بكر قلت ابن عباس . قال " اللهم فقهه " .
Ibn 'Abbas reported that Allah's Messenger (may peace be upon him) came to privy and I placed for him water for ablution, When he came out he said: Who placed it here? And in a version of Zuhair they (the Companions) said, and in the version of Abu Bakr (the words are): I said: It is Ibn 'Abbas (who has done that), whereupon he (the Holy Prophet) said: May Allah grant him deep understanding of religion.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).