Jamieson, Fausset and Brown on Malachi 1:13

13. what a weariness is it!--Ye regard God's service as irksome, and therefore try to get it over by presenting the most worthless offerings. Compare Mi 6:3, where God challenges His people to show wherein is the "weariness" or hardship of His service. Also Is 43:22-24, wherein He shows that it is they who have "wearied" Him, not He who has wearied them.

snuffed at--despised.

it--the table of the Lord, and the meat on it (Mal 1:12).

torn--namely, by beasts, which it was not lawful to eat, much less to offer (Ex 22:31).

thus ... offering--Hebrew, mincha; the unbloody offering of flour, &c. Though this may have been of ordinary ingredients, yet the sacrifices of blemished animals accompanying it rendered it unacceptable.