כִּ֥י שִׁבְעָתַ֖יִם יֻקַּם־קָ֑יִן וְלֶ֖מֶךְ שִׁבְעִ֥ים וְשִׁבְעָֽה׃
Wird Kain siebenfach gerächt, so Lemech siebenundsiebzig mal.«
Targum Jonathan on Genesis
For Kain who sinned and was converted by repentance (had protection) unto seven generations extended to him: and to Lemek, the son of his son, who hath not sinned, it is just that it shall be extended unto seventy and seven.