Murderous jealousy
When King Saul began to look at David with jealous eyes (1 Sam. 28: 9), he was afraid of David.
The reason is because he knew that the Lord had left him and was with David (v. 12).
So he sent David away from him (v. 13).
Because the Lord with with David, he had great success in everything he did.
And when Saul saw how successful David was, he was afraid of him (vv. 14-15).
When he saw all Israel and Judah loved David (v. 16)
and even his own daughter Michal loved David (vv. 20, 28),
He became still more afraid of David, and he remained his enemy the rest of his days (v. 29).
That was why Saul tried to kill an innocent man like David for no reason (19:5).
Jealousy makes us to dislike and even hate someone for no reason.
It makes us to be distanced from him/her.
It even makes us to want to kill him/her and actually makes us to try to murder him/her.
And jealousy actually makes us to kill him/her.
This is ‘Murderous jealousy.’