Pirkei Avot §avot_04_14: Rabbi Nehorai said: go as a [voluntary] exile to a place of Torah and say not...

Rabbi Nehorai said: go as a [voluntary] exile to a place of Torah and say not that it will come after you, for [it is] your fellow [student]s who will make it permanent in your hand and “and lean not upon your own understanding” (Proverbs 3:5).