Malachi 3:4-5

Then shall the offering of Judah and Jerusalem be pleasant unto the LORD, as in the days of old, and as in former years.

Then shall the offering of Judah and Jerusalem be pleasant unto the Lord, as in the days of old - (Malachi 1:11; Malachi 2:5). The "offering" ( minchaah (H4503), Hebrew) is not expiatory, but beneficence, alms, "the sacrifice of praise to God continually," prayer, thanksgiving, and self-dedication (Romans 12:1; Hebrews 13:15; 1 Peter 2:5).

And I will come near to you to judgment - I whom ye challenge, saying, "Where is the God of judgment?" (Malachi 2:17.)

And I will be a swift witness against the sorcerers - I, whom ye think far off, and to be slow in judgment, am "near," and will come as a "swift witness;" not only a judge, but also an eye-witness against sorcerers; for mine eyes see every sin, though ye think I take no heed. Earthly judges need witnesses to enable them to decide aright: I alone need none. Sinners will be awfully undeceived, who flattered themselves, "God will never see it;" "How doth God know? and is there knowledge in the most High?" (Psalms 10:11; Psalms 73:11; Psalms 94:7, etc.)

Sorcerers - a sin into which the Jews were led in connection with their foreign idolatrous wives. The Jews of Christ's time also practiced sorcery (Acts 8:9; Acts 13:6; Galatians 5:20; Josephus' 'Antiquities,' 20: 6; 'Bellum Judaicum,' 2:; 12: 23). It shall be a characteristic of the last anti-Christian confederacy about to be consumed by the brightness of Christ's coming (Matthew 24:24; 2 Thessalonians 2:9; Revelation 13:13; Revelation 16:13; also 9:21; 18:23; 21:8; 22:15). Romanism has practiced it: an order of exorcists exists in that church.

Adulterers - stigmatized in Malachi 2:15.

Against those ... fear not me - the source of all sins.