Malachi 1:9

1:9 But now plead for God’s favor that he might be gracious to us. “With this kind of offering in your hands, how can he be pleased with you?” asks the Lord who rules over all.

Malachi 2:13

2:13 You also do this: You cover the altar of the Lord with tears as you weep and groan, because he no longer pays any attention to the offering nor accepts it favorably from you.