Matthew 5:20 sets the theme of surpassing standard righteousness — this verse applies it to greeting, calling for more than what even Gentiles do.

In Matthew 6:32, Gentiles seek after material things — same contrast group as in 5:47 where Gentiles greet brothers. Both highlight distinct Christian behavior.

In Matthew 9:10, Jesus eats with tax collectors and sinners — embodying the love beyond one's circle that 5:47 calls for.

Matthew 10:12 instructs greeting households in mission — a positive example of extending greeting beyond one's circle, contrasting the limited greeting criticized here.

Luke 6:32 is the parallel account of this same teaching, using 'sinners' instead of 'tax collectors' — reinforcing Jesus' call to love beyond reciprocation.

2 Kings 6:23 shows Elisha feasting his enemies — an OT example of kindness to foes, illustrating the principle of doing more than expected that Jesus teaches here.

In Luke 12:30, the nations of the world seek after things — same contrast as Matthew 6:32, showing the worldly standard vs. kingdom.