John 7:4
For there is no man that doeth any thing in secret, and he himself seeketh to be known openly. If thou do these things, shew thyself to the world.
Cross-reference
John 18:20 shows Jesus taught openly in public — confirming he was not secretive, contrary to the brothers' implication.
In John 6:15, Jesus withdraws from crowds wanting to make him king — same avoidance of public acclaim that his brothers challenge here.
In John 11:54, Jesus later moves secretly in Judea due to threats — contrasting the public display his brothers urge here.
Matthew 4:6 records Satan tempting Jesus to perform a public miracle — similar to the brothers' dare to show Himself to the world.
In Matthew 6:1, Jesus warns against performing acts for public acclaim — directly opposing his brothers' advice here.
In Matthew 6:2, Jesus condemns seeking honor by public displays — contrasting with the brothers' demand for Jesus to show himself.
Matthew 6:5 condemns praying to be seen by men — directly opposing the brothers' advice here to seek public recognition.
Matthew 6:16 warns against fasting to be noticed by others — contrasting the brothers' urging to go public with one's deeds.
Matthew 23:5 describes Pharisees doing all deeds to be seen — opposing the mindset behind the brothers' challenge to show oneself publicly.
Matthew 6:3 instructs giving in secret — a direct contrast to the brothers' exhortation to show oneself publicly.