Matthew 18:2
And Jesus called a little child unto him, and set him in the midst of them,
Cross-reference
Matthew 19:14 repeats Jesus' teaching that children represent the kingdom, reinforcing the lesson from the child placed among them.
Matthew 19:13 records the disciples rebuking those bringing children, contrasting with Jesus' earlier placement of a child as an example.
Mark 9:36 records the same scene of Jesus placing a child among the disciples, offering a parallel account of the event.
Mark 9:37 expands the teaching: welcoming a child welcomes Christ, directly building on the child placed among them here.
Luke 9:47 provides the same incident of Jesus taking a child, with the added detail of the child standing beside him.
Jeremiah 1:7 shows God rejecting Jeremiah's child-excuse, contrasting with Jesus who says become like a child to enter the kingdom.