Musannaf Ibn Abi Shayba 27:583

Abdullah bin Bakr narrated to us, from Hatim bin Abi Saghirah, from Amr bin Dinar, that Kurayb informed him, from Ibn Abbas, from the Prophet (peace and blessings of Allah be upon him), who said: "The Messenger of Allah (peace and blessings of Allah be upon him) prayed for me that He increase me in knowledge and understanding."