Synopsis of the Books of the Bible, by John Nelson Darby, [1857-62], at sacred-texts.com
Amos Chapter 4
Chapter 4 presents the oppression of the poor, and the worship which the children of Israel rendered at will in the places they had chosen. God also would act as He saw fit. He had indeed already done so; nevertheless they had not returned unto Him. He had repeated His chastisements in the most significant manner, but in vain. Therefore He calls on Israel to prepare to meet Himself.