The Messenger of Allah (ﷺ) used to say, when he said the salaam at the end of Fajr prayer: “Allaahumma 'innee 'as'aluka 'ilman naafi'an, wa rizqan tayyiban, wa 'amalan mutaqabbalan”
اللَّهُمَّ إنِّي أَسْأَلُكَ عِلْماً نَافِعاً، وَرِزقاً طَيِّباً، وَعَمَلاً مُتَقَبَّلاً
O Allah, I ask You for knowledge that is of benefit, a good provision, and deeds that will be accepted. (Recite upon rising in the morning)
Sunan Ibn Majah 925