The Prophet (ﷺ) performed the fajr prayer, after he said the Salam, he would say:

اَللَّهُمَّ إِنِّي أَسْأَلُكَ عِلْمًا نَافِعًا وَرِزْقًا طَيِّبًا وَعَمَلًا مُتَقَبَّلًا

Allaahumma 'innee 'as'aluka 'ilman naafi'an, wa rizqan tayyiban, wa 'amalan mutaqabbalan

O Allah, I ask You for knowledge that is of benefit, a good provision, and deeds that will be accepted.

Reference: Sahih. Ibn Majah: 925