9 Then a harmful spirit from the Lord came upon Saul, as he sat in his house with his spear in his hand. And David was playing the lyre.

Matthew Henry's Commentary on 1 Samuel 19:9

Commentary on 1 Samuel 19:1-10

(Read 1 Samuel 19:1-10)

How forcible are right words! Saul was, for a time, convinced of the unreasonableness of his enmity to David; but he continued his malice against David. So incurable is the hatred of the seed of the serpent against that of the woman; so deceitful and desperately wicked is the heart of man without the grace of God, Jeremiah 17:9.