Shmuel Alef 18:10

10 And it came to pass on the next day, that the ruach Elohim ra’ah came upon Sha’ul, and he prophesied inside the bais; and Dovid made [kinnor] music with his yad, as at other times; and there was a khanit in the yad Sha’ul.

Shmuel Alef 18:10 Meaning and Commentary

1 Samuel 18:10

And it came to pass on the morrow
After the women had met him with their music and dancing, and when returned home:

that the evil spirit from God came upon Saul;
thinking on the above things that had passed, he became melancholy:

and he prophesied in the midst of the house;
either really, delivering out divine songs, as the prophets did; according to Abarbinel, he foretold that David would be king, and the kingdom would be taken from him, and given to him; or he feigned himself a prophet, mimicking their motions and gestures; or, as the Targum, acted like a mad man, or a fool, uttering foolish words, and using ridiculous gestures, which seems most agreeable to the evil spirit in him:

and David played with his hand as at other times;
upon his harp, to remove the evil spirit, or melancholy disposition from Saul; for though he was now advanced at court, and an officer in the army, and high in the affections and applause of the people: yet he did not think it below him to act as a musician, to do service to his prince; of such an humble, kind, and ingenuous disposition was he:

and [there was] a javelin in Saul's hand;
a kind of spear, or half pike, which he had taken into his hand on purpose to kill David while playing; for persons in such circumstances as his, as they are very mischievous, so very subtle at contriving.

Shmuel Alef 18:10 In-Context

8 And Sha’ul was very angry, and the saying was displeasing in his eyes and he said, They have ascribed unto Dovid revavot, and to me they have ascribed but alafim; and what can he have more but the maluchah (kingship)?

9 And there was jealous suspicion in the way Sha’ul eyed Dovid from that day forward.

10 And it came to pass on the next day, that the ruach Elohim ra’ah came upon Sha’ul, and he prophesied inside the bais; and Dovid made [kinnor] music with his yad, as at other times; and there was a khanit in the yad Sha’ul.

11 And Sha’ul hurled the khanit; for he said, I will pin Dovid even to the wall with it. And Dovid escaped his presence twice.

12 And Sha’ul was afraid of Dovid, because Hashem was with him, and was departed from Sha’ul.