اللَّهُمَّ انْفَعْنِي بِمَا عَلَّمْتَنِي وَعَلِّمْنِي مَا يَنْفَعُنِي وَزِدْنِي عِلْمًا
Transliteration
Allahummanfa'ni bima 'allamtani wa 'allimni ma yanfa'uni wa zidni 'ilma
English meaning
O Allah, benefit me with what You have taught me, teach me what will benefit me, and increase me in knowledge.
When is it recited?
Recited in study sessions and before classes.
Source
Tirmidhi, Da'awat 128, 3599; Ibn Majah, Muqaddimah 23, 251