Luke 1:80 notes John lived in the wilderness — the very setting Jesus refers to when asking what they went to see.

Luke 3:2 places John receiving God's word in the wilderness — clarifying the location of his ministry that Jesus references.

Matthew 3:1-5 describes John's wilderness preaching and crowds coming out — the scene Jesus is referring to.

Matthew 11:7 is a parallel account where Jesus asks the same question about John the Baptist.

Matthew 11:8 continues the same discourse: 'A man dressed in fine clothes?' — directly parallel to Luke's question.

Mark 1:4 introduces John baptizing in the wilderness — the same context Jesus asks the crowd about.

1 Kings 14:15 uses the exact phrase 'reed shaken in the water' to describe Israel's instability, which Jesus likely alludes to.

Mark 1:5 shows the crowds flocking to John in the wilderness, providing the historical context for Jesus' question about what they went out to see.

John 1:23 records John's self-identification as a voice in the wilderness, directly linking to the wilderness setting of Jesus' question.