This is essentially the same warning to the wicked which the Savior previously mentioned in 3 Nephi 16:10 and 3 Nephi 21:14-19.
Jeffrey R. Holland
"The Lord declares his anger not only against sorcerers, adulterers, and those who are untrue in any way, but also against those who are ungenerous to the hireling, the stranger, the widow, and the fatherless. In calling those to return who have strayed, he speaks of the good that could be done to such needy if there were 'meat in my house.' If such tithes and offerings are not returned to the Lord, inasmuch as they are rightfully his, then the people and the land are 'cursed with a curse'." (Christ and the New Covenant, p. 296)