Malachi 3:4 - Matthew Poole's English Annotations on the Holy Bible

Then; when the Lord, Messenger or Angel of the covenant, the King Messiah, shall be come, and set up his kingdom, framed his gospel church. The offerings; the services and duties required of the church, and performed by it, expressed here in an allusion to the law services: such are now fervent prayers, Psalms 141:2, lively praises, thankful memorials of the death of Christ in the sacraments, attentive hearing the word, and giving up ourselves, soul and body, a holy, living sacrifice to God, Romans 12:1; and alms, Hebrews 13:15,16. Of Judah and Jerusalem; the Christian church, expressed by the names of its type. Pleasant; delightful, as sweet odours to the smell, as savoury meats to the taste, as comely objects to the eye, every way acceptable to God. As in the days of old, and as in former years; this acceptance God will give shall be as great and gracious as ever he gave to any of the services of his saints of old. We need not determine the precise times to which these expressions refer; it is certain God did greatly delight in the sacrifices and offerings of his people, when they offered them in right manner. He will give as gracious acceptance still, which implieth a continuance of these sacrifices which he will accept, and inferreth that this coming of Christ is not his coming to judge the world, his last coming.