וּמֶ֤ה ׀ לֹא־תִשָּׂ֣א פִשְׁעִי֮ וְתַעֲבִ֪יר אֶת־עֲוֺ֫נִ֥י כִּֽי־עַ֭תָּה לֶעָפָ֣ר אֶשְׁכָּ֑ב וְשִׁ֖חֲרְתַּ֣נִי וְאֵינֶֽנִּי׃ (פ)
주께서 어찌하여 내 허물을 사하여 주지 아니하시며 내 죄악을 제하여 버리지 아니하시나이까 내가 이제 흙에 누우리니 주께서 나를 부지런히 찾으실지라도 내가 있지 아니하리이다
Otzar Midrashim
The Raavya (19th chapter) wrote that originally it was called Midrash Rabbi Nehunya ben HaKana (and so it is referred to by the Ramban and the Tzioni), after its opening "Said Rabbi Nehunya ben HaKana" (even though his name is not mentioned a second time in this book), and afterwards there was uncertainty whether he authored it, so they called it Sefer HaBahir, from the verse it opens with "Pure it is in the skies" (Job 37:21).