Malachi 2:2
2 aIf you will not listen, if you will not take it to heart to give honor to my name, says the Lord of hosts, then I will send bthe curse upon you and I will curse cyour blessings. Indeed, I have already cursed them, because you do not lay it to heart.
Malachi 3:14
14 You have said, i‘It is vain to serve God. jWhat is the profit of our keeping his charge or of walking as in mourning before the Lord of hosts?