What does 1 Chronicles 28:5 mean?

And out of all my sons—since the Lord has given me a lot of them—he picked Solomon, my son, to sit on Israel’s throne and rule for God. 1 Chronicles 28:5 - Modern Text Bible

(David points out that God didn’t just choose him, but also specifically chose Solomon, even though David had many sons. This is about God’s plan, not family favoritism.)