'Slack' in the Bible

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.

When thou shalt vow a vow unto Jehovah thy God, thou shalt not be slack to pay it: for Jehovah thy God will surely require it of thee; and it would be sin in thee.

And the men of Gibeon sent unto Joshua to the camp to Gilgal, saying, Slack not thy hand from thy servants; come up to us quickly, and save us, and help us: for all the kings of the Amorites that dwell in the hill-country are gathered together against us.

And Joshua said unto the children of Israel, How long are ye slack to go in to possess the land, which Jehovah, the God of your fathers, hath given you?

But be ye strong, and let not your hands be slack; for your work shall be rewarded.

And take heed that ye be not slack herein: why should damage grow to the hurt of the kings?

He becometh poor that worketh with a slack hand; But the hand of the diligent maketh rich.

He also that is slack in his work Is brother to him that is a destroyer.

In that day it shall be said to Jerusalem, Fear thou not; O Zion, let not thy hands be slack.

The Lord is not slack concerning his promise, as some count slackness; but is longsuffering to you-ward, not wishing that any should perish, but that all should come to repentance.