John Gill Commentary 2 Samuel 1:14

"And David said unto him, How wast thou not afraid to put forth thy hand to destroy Jehovah`s anointed?" — 2 Samuel 1:14 (ASV)

And David said to him, how, were you not afraid to stretch
forth your hand
By which it should seem that he did more than stand upon him, and press his body, that the spear might pierce through him, but that he drew his sword, and slew him; so David understood him, and is the sense of the phrase in (1 Samuel 17:51) ;

to destroy the Lord's anointed ?
a reason why David did not destroy him, when it was in the power of his hands, and which he made use of to dissuade others from it; and here charges it not only as a criminal, but a daring action in this young man, at which he expresses his admiration how he could do it; hereby representing it as a very shocking and detestable action; see (1 Samuel 24:6) (1 Samuel 26:9 1 Samuel 26:11) .