Charles Spurgeon Commentary Malachi 3:6

"For I, Jehovah, change not; therefore ye, O sons of Jacob, are not consumed." — Malachi 3:6 (ASV)

This is their comfort; even the immutability of God is on the side of his people. He is just, and always just; he hates sin, and always hates sin; yet that unchangeableness of his is always on the side of the people of his choice.