Strong H309 אָחַר 'âchar · to delay

Deuteronomy

1. Deuteronomy 7:10
   And repayeth them that hate him to their face, to destroy them: he will not be slack to him that hateth him, he will repay him to his face.
2. Deuteronomy 23:21
   When thou shalt vow a vow unto the Lord thy God, thou shalt not slack to pay it: for the Lord thy God will surely require it of thee; and it would be sin in thee.