Ben Sira 32:19

19 Never do anything without thinking it through, and once you have done something, don't look back and wish you had done something else.

Ben Sira 32:19 In-Context

17 Sinners have no use for correction, and will interpret the Law to suit themselves.
18 Sensible people will consider every opinion, but arrogant people will let nothing stand in their way.
19 Never do anything without thinking it through, and once you have done something, don't look back and wish you had done something else.
20 Don't take a course of action that is dangerous, and don't make the same mistake twice.
21 Don't be too sure of yourself, even when the way looks easy.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.