John Gill Commentary Amos 5:21

"I hate, I despise your feasts, and I will take no delight in your solemn assemblies." — Amos 5:21 (ASV)

I hate, I despise your feast days Kimchi thinks this is said, and what follows, with respect to the kingdom of the house of Judah, which kept the feast the Lord commanded; but it is not necessary so to understand it; for doubtless the ten tribes imitated the worship at Jerusalem, and kept the feasts as the Jews did there, in the observance of which they trusted; but the Lord rejects their vain confidence, and lets them know that these were no ways acceptable to him; and were so far from atoning for their sins, that they were hated, abhorred, and despised by him, being observed in such a manner and with such a view as they were;

and I will not smell in your solemn assemblies ; a sweet savour of rest, as in (Genesis 8:21) ; take no pleasure in their duties and services performed, in their solemn assemblies convened together for religious purposes, nor accept of them; but, on the contrary, dislike and abhor them; see (Isaiah 1:11–14) .