Musnad Abu Ya'la al-Mawsili 209:52

Muhammad ibn Bashar narrated to us, Muhammad narrated to us, Shu'bah narrated to us, from Musa ibn Abi 'Aishah, from a freedwoman of Umm Salamah, from Umm Salamah: That the Messenger of Allah (peace and blessings of Allah be upon him), when he prayed the dawn prayer and then performed the taslim, would say: "O Allah, I ask You for beneficial knowledge, goodly provision, and accepted deeds."