Verses with the word cleave in the New Testament (4 verses):

Matthew 19:5
And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?

Mark 10:7
For this cause shall a man leave his father and mother, and cleave to his wife;

Acts 11:23
Who, when he came, and had seen the grace of God, was glad, and exhorted them all, that with purpose of heart they would cleave unto the Lord.

Romans 12:9
Let love be without dissimulation. Abhor that which is evil; cleave to that which is good.