Malachi 2:14 shows God as witness to the marriage covenant, condemning faithlessness — echoing Jesus' 'what God has joined together'.

Mark 10:9 is the parallel account of the same saying, word-for-word, from the same event in Jesus' ministry.

Mark 10:7 quotes Genesis 2:24 as the OT foundation for leaving and cleaving, which Jesus uses to define God's joining.

1 Corinthians 6:16 applies the same 'one flesh' verse to prostitution, showing the gravity of sexual sin in contrast to marriage.

1 Corinthians 7:10-14 reiterates Jesus' no-divorce command and applies it to mixed marriages, introducing the Pauline exception.

Romans 7:2 adds the legal principle that marriage binds until death, complementing Jesus' teaching on indissolubility.

Ephesians 5:28 applies the 'one flesh' union to husbandly love, showing the ethical outworking of God's joining.

Genesis 31:50 invokes God as witness to a marriage covenant, an OT precedent for the divine joining Jesus references.

Hebrews 13:4 upholds marriage honor and warns against defilement, reinforcing the sanctity that underlies Jesus' prohibition of divorce.