Charles Ellicott Commentary Malachi 2:15-16

"And did he not make one, although he had the residue of the Spirit? And wherefore one? He sought a godly seed. Therefore take heed to your spirit, and let none deal treacherously against the wife of his youth. For I hate putting away, saith Jehovah, the God of Israel, and him that covereth his garment with violence, saith Jehovah of hosts: therefore take heed to your spirit, that ye deal not treacherously." — Malachi 2:15-16 (ASV)

These are two very difficult verses, which should perhaps, be rendered as follows:—

For did He not make [man and his wife, Genesis 2:24] one? And has he [the husband] any superiority of spirit [that he should divorce at will]? And what is this [pair which has become] one? [Answer.] It seeks a godly seed. Therefore take heed to yourselves [literally, your spirit], and with respect to the wife of your youth — Let none be faithless.