John Gill Commentary 1 Samuel 16:22

"And Saul sent to Jesse, saying, Let David, I pray thee, stand before me; for he hath found favor in my sight." — 1 Samuel 16:22 (ASV)

And Saul sent to Jesse, saying, let David, I pray you, stand
before me
Continue in his service; which was great condescension in him, and great respect shown to Jesse, not to detain his son without his leave, and to ask it as a favour of him:

for he has found favour in my sight :
was very acceptable to him which must be very pleasing to Jesse to hear; especially if he was in any fear that Saul had an ill design upon him, when he first sent for him.