1 Samuel 19:24
And he stripped off his clothes also, and prophesied before Samuel in like manner, and lay down naked all that day and all that night. Wherefore they say, Is Saul also among the prophets?
Cross-reference
In 1 Samuel 10:10-12, the same saying 'Is Saul also among the prophets?' first appears when Saul first prophesied.
In 1 Samuel 10:6, Samuel predicts the Spirit will come on Saul and he will prophesy — the source of the behavior seen here.
In 1 Samuel 10:11, the same question 'Is Saul also among the prophets?' is asked at his first prophesying.
In 1 Samuel 18:10, Saul prophesies under an evil spirit and tries to kill David, contrasting with the Spirit of God's prophecy here.
In 2 Samuel 6:20, Michal rebukes David for uncovering himself, mirroring the shame Saul faced for his naked prophesying.
In Isaiah 20:2, the prophet walks naked as a sign, paralleling Saul's naked prophesying as a prophetic act.
In Micah 1:8, the prophet goes stripped and naked in lament, similar to Saul's nakedness but for mourning rather than prophesying.