Malachi 2:15
15 And did not he make one? Yet had he the residued of the spirit. And wherefore one? That he might seek a godly seed. Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth.
Mal. 2:15. "And did he not make one? Yet had he the residue of the Spirit." He made them one flesh, their bodies are each other's; but the rest (or residue), which is the Spirit, God reserves for himself. A man is one body with his wife, but one Spirit with Christ. 1 Corinthians 6:16; 1 Corinthians 6:17. The phrase in this sense is not different from what is common, as Deuteronomy 21:8 thy people of Israel; the city of London; the city of Jerusalem: and besides, it does not appear by the original but the words are in opposition and not in regimen. It might have been translated the residue, the Spirit; or if we interpret it as in the margin, the excellency of the Spirit, then the meaning is, that though God needed them, and therefore they ought to be most nearly united in affection, yet he reserved to himself the soul's best love, the best of the heart.
Mal. 4:1-2