Be ye not unequally yoked together with unbelievers .... Wherefore come out from among them, and be ye separate, saith the Lord. 2 Corinthians 17:0
Trivia: According to 2 Corinthians 2, how can you tell if you are saved?
(In the Bible it is always the women who are barren, never the men.)
But Sarai was barren; she had no child. Genesis 11:30, 16:1-2
Isaac intreated the LORD for his wife, because she was barren. Genesis 25:21
Rachel was barren. Genesis 29:31
There was a certain man ... whose name was Manoah; and his wife was barren. Judges 13:2
Elkannah ...had two wives; the name of the one was Hannah.... The Lord had shut up her womb. 1 Samuel 1:1-5
They had no child, because that Elisabeth was barren. Luke 1:7