ربِّ زِدْنِي عِلْماً
My Lord, increase me in knowledge.

This dua was revealed by Allah (SWT) to our last prophetic teacher, Prophet Muhammad in Surah Taha ayah 114. The translation of this ayah is:

“So high [above all] is Allah, the Sovereign, the Truth. And, [O Muhammad], do not hasten with [recitation of] the Qur’an before its revelation is completed to you, and say, “My Lord, increase me in knowledge.”