Matthew 5:1 uses the exact same phrasing: Jesus went up on a mountain and sat down, introducing the Sermon on the Mount.

John 6:3 records Jesus going up a mountain and sitting down with his disciples — the same posture seen here, setting the stage for a great miracle.

Luke 5:1 describes Jesus teaching by the Lake of Gennesaret, the same sea as in Matthew 15:29.

John 6:1 places Jesus going to the other side of the Sea of Galilee, setting the stage for the feeding.

John 21:1 records Jesus' post-resurrection appearance by the Sea of Tiberias, the same body of water.