Dua after Fajr prayer — beneficial knowledge
اللّهُـمَّ إِنِّـي أَسْأَلُـكَ عِلْمـاً نافِعـاً وَرِزْقـاً...
اللّهُـمَّ إِنِّـي أَسْأَلُـكَ عِلْمـاً نافِعـاً وَرِزْقـاً طَيِّـباً وَعَمَـلاً مُتَقَـبَّلاً
Allahumma innee as-aluka AAilman nafiAAan, warizqan tayyiban, waAAamalan mutaqabbalan
Translation
O Allah, I ask You for knowledge which is beneficial and sustenance which is good, and deeds which are acceptable.
When to recite
Recited after giving salam for the Fajr prayer only.
Source / Reference
Ibn Majah 1/152