As Samuel turned to leave Saul, what tore when Saul grabbed it?

Answer: The hem of Samuel's robe

Samuel then said, "The LORD has torn the kingdom of Israel from you today and has given it to your neighbor who is better than you."

“As Samuel turned to go, Saul grabbed the hem of his robe, and it tore. So Samuel said to him, “The LORD has torn the kingdom of Israel from you today and has given it to your neighbor who is better than you.”— 1 Samuel 15:27-28 (BSB)