Charles Ellicott Commentary 2 Samuel 16:22

"So they spread Absalom a tent upon the top of the house; and Absalom went in unto his father`s concubines in the sight of all Israel." — 2 Samuel 16:22 (ASV)

A tent upon the top of the house. —Nathan had foretold that the nature of David’s public punishment should correspond to the character of his secret crime. The fact that this punishment takes place on the very roof where David had first yielded to his guilty passion makes it particularly striking.