اللَّهُمَّ إِنِّي أَسْأَلُكَ عِلْمًا نَافِعًا، وَرِزْقًا طَيِّبًا، وَعَمَلًا مُتَقَبَّلًا
Allahumma inni as'aluka 'ilman nafi'an, wa rizqan tayyiban, wa 'amalan mutaqabbala
Allaahumma waxaan kaa baryayaa cilmi waxtar leh, rizqi wanaagsan, iyo camal la aqbalo.
Recite after Fajr prayer
The Prophet (PBUH) used to say this dua after the Fajr prayer.