اللَّهُمَّ إِنِّي أَسْتَوْدِعُكَ مَا قَرَأْتُ وَمَا حَفِظْتُ وَمَا تَعَلَّمْتُ، فَرُدَّهُ عَلَيَّ عِنْدَ حَاجَتِي إِلَيْهِ
Allahumma inni astawdi'uka ma qara'tu wa ma hafiztu wa ma ta'allamtu, faruddahu 'alayya 'inda hajati ilayh
O Allah, ich vertraue Dir an, was ich gelesen, auswendig gelernt und gelernt habe. Gib es mir zurück, wenn ich es brauche.
Recite after finishing studying
This dua asks Allah to preserve what you learned and help you recall it when needed, especially during exams.