תלמוד על ברכות 56:29

MISHNAH: Rebbi Neḥoniah ben Haqqanah¹²⁵A Tanna of the second generation, teacher of Rebbi Ismael. In Medieval mysticism he is credited with authorship of Sefer Habahir and many mystical teachings. used to recite a short prayer when he entered and when he left the house of study. They asked him, what kind of prayer is this? He told them: When I enter, I pray that no mishap should come through me and when I leave I give thanks for my lot.