Dua for beneficial knowledge

اللَّهُمَّ إِنِّي أَسْأَلُكَ عِلْمًا نَافِعًا وَرِزْقًا طَيِّبًا وَعَمَلًا مُتَقَبَّلًا

Allahumma inni as'aluka 'ilman nafi'an, wa rizqan tayyiban, wa 'amalan mutaqabbala

“O Allah, I ask You for beneficial knowledge, good provision, and accepted deeds.”

— Sunan Ibn Majah 925 (sahih)