Verses with the word unless in the Old Testament (7 verses):

Leviticus 22:6
The soul which hath touched any such shall be unclean until even, and shall not eat of the holy things, unless he wash his flesh with water.

Numbers 22:33
And the ass saw me, and turned from me these three times: unless she had turned from me, surely now also I had slain thee, and saved her alive.

2 Samuel 2:27
And Joab said, As God liveth, unless thou hadst spoken, surely then in the morning the people had gone up every one from following his brother.

Psalms 27:13
I had fainted, unless I had believed to see the goodness of the LORD in the land of the living.

Psalms 94:17
Unless the LORD had been my help, my soul had almost dwelt in silence.

Psalms 119:92
Unless thy law had been my delights, I should then have perished in mine affliction.

Proverbs 4:16
For they sleep not, except they have done mischief; and their sleep is taken away, unless they cause some to fall.