4QInstruction, or Sapiential Work A (Hebrew: מוסר למבין‎, romanized: Musar leMevin, lit. 'Instruction to a student'), is a document that is preserved in at least seven fragmentary manuscripts from the Dead Sea Scrolls; these are 4Q415, 4Q416, 4Q417, 4Q418, 4Q418a, 4Q423, and 1Q26. Cave 1 materials were first published by Józef Milik in DJD 1 in 1955. Cave 4 materials were published in the Discoveries in the Judean Desert series in 1999 by John Strugnell and Daniel Harrington. The document is written in Hebrew and is likely to be categorized as "non-sectarian" or perhaps "pre-sectarian". There is some consensus that it dates to the third century BCE.