'Composed' in the Bible

For the music director; according to the tune of "Lilies;" by the Korahites, a well-written poem, a love song. My heart is stirred by a beautiful song. I say, "I have composed this special song for the king; my tongue is as skilled as the stylus of an experienced scribe."

Indeed I am composed and quiet, like a young child carried by its mother; I am content like the young child I carry.