Malachi 3:9 - Albert Barnes' Notes on the Bible

Ye have been cursed with the curse - (not “with a curse”). The curse threatened had come upon them: but, as fore-supposed in Leviticus by the repeated burden, “If ye still walk contrary to Me,” they had persevered in evil. God had already shown His displeasure. But they, so far from being amended by it, were the more hardened in their sin. Perhaps as men do, they pleaded their punishment, as a reason why they should not amend. They defrauded God, under false pretences. They were impoverished by His curse, and so they could not afford to pay the tithes; as men say, “the times are bad; so we cannot help the poor” of Christ. “And Me ye still are defrauding” Me, ye; man, God. And that not one or other, but this whole people. It was a requital as to that, in which they had offended. “Because ye have not rendered tithes and first-fruits, therefore ye are cursed in famine and penury.” “Because the people did not render tithes and first-fruits to the Levites, the Lord saith, that He Himself suffered fraud, whose ministers, constrained by hunger and penury, deserted the temple. For, if He is visited by others in prison, and sick, is received and cared for, and, hungry and athirst, receives food and drink, why should He not receive tithes in His ministers, and, if they are not given, be Himself deprived of His portion?”