Jeremiah 6:20

Even though the Judeans still worshipped God formally, their sacrifices made no impression on Him (cf. Isaiah 1:11-14; Amos 5:21; Micah 6:6-8). It was their true attitudes and actions that He saw.

"Sheba" was a famous southwest Arabia (possibly modern Yemen) source for the incense used in the offerings (cf. 1 Kings 10:1-13; Ezekiel 27:22). Sweet cane (calamus) was an ingredient in the anointing oil (Exodus 30:22-25; cf. Song of Solomon 4:14; Isaiah 43:24) and was also an expensive import item, perhaps coming from India. Burnt offerings were those in which the entire animal was offered up to God, and sacrifices were those offerings that were partially eaten by their worshippers.