1 Samuel 15:27

“And as Samuel turned about to go away, etc.] From Saul, a different way from Gilgal, perhaps towards his own city Ramah, with an intention to have nothing more to say to Saul, or to do with him, or to see his face no more; so displeased was he with him: he laid hold upon the skirt of his mantle; in order to detain him, and prevent his departure from him, and his going a different way: and it rent; Samuel twitching away from him with great vehemence and warmth. The Jewish f309 Rabbins are divided about this, whose skirt was rent; some say it was Samuel that rent the skirt of Saul, and by this signified to him, that he that cut off the skirt of his garment should reign in his stead; whereby…”

“he laid hold upon the skirt of his mantle--the moil, upper tunic, official robe. In an agony of mental excitement, he took hold of the prophet's dress to detain him; the rending of the mantle [Sa1 15:27] was adroitly pointed to as a significant and mystical representation of his severance from the throne.”