Reference for Psalms 53:4

כֻּלּ֥וֹ סָג֮ יַחְדָּ֪ו נֶ֫אֱלָ֥חוּ אֵ֤ין עֹֽשֵׂה־ט֑וֹב אֵ֝֗ין גַּם־אֶחָֽד׃

Every one of them is unclean, they are together become impure; There is none that doeth good, no, not one.

ספר השרשים