A man may obtain forgiveness after the third transgression, but if he
repeat the offense a fourth time, he is not pardoned again; for it is
said (Amos ii. 4), "For three transgressions of Judah, and for four, I
will not turn away the punishment thereof;" and again (Job xxxiii. 29),
"Lo! all these things doth God two or three times" (and so inferentially
not four times) "with man to bring back his soul from the pit."
THE TALMUD, _Yoma_, fol. 86, col. 2.