Malachi 1:2; Malachi 1:6-7

2 "I have loved you deeply," says the LORD.But you retort, "Really? How have you loved us?" And the LORD replies, "I showed my love for you by loving your ancestor Jacob. Yet Esau was Jacob's brother,
6 The LORD Almighty says to the priests: "A son honors his father, and a servant respects his master. I am your father and master, but where are the honor and respect I deserve? You have despised my name!" But you ask, 'How have we ever despised your name?' 7 "You have despised my name by offering defiled sacrifices on my altar." Then you ask, 'How have we defiled the sacrifices ?'" You defile them by saying the altar of the LORD deserves no respect.