1 Corinthians 12:13 describes baptism by one Spirit into one body — echoing 1 Cor 6:17’s union with the Lord as one spirit.

John 17:21-23 prays for believers’ oneness with God — mirroring 1 Cor 6:17’s ‘one spirit with the Lord’ as deep spiritual union.

Ephesians 4:3 urges maintaining the Spirit’s unity — applying 1 Cor 6:17’s one-spirit union to practical church life.

Genesis 2:24 provides the 'one flesh' union that Paul contrasts in verse 16—here the spiritual 'one spirit' union is the higher reality.

Isaiah 56:3 uses the same phrase 'joined to the LORD' for foreigners—Paul applies this language to all believers in Christ.

Psalm 86:11 asks God to 'unite my heart'—a parallel desire for single-hearted devotion, mirroring being joined to the Lord.

In Ephesians 4:4, the one Spirit and one body echo the one spirit union with Christ here, emphasizing unity in the Spirit.

Ephesians 5:30 states we are members of Christ's body—a parallel truth to being joined to the Lord as one spirit.