Acts 15:16

After this I will return] Amos simply has 'In that day,' i.e. in the day of the Messiah. The tabernacle of David] i.e. the royal family descended from David. David's family is compared to a fallen tent, because, when Amos wrote, the southern kingdom was quite insignificant compared with the northern.

17, 18. Who doeth all these things. Known unto God are all his works from the beginning of the world] There is nothing in Amos corresponding to these words. RV reads, 'who maketh these things known from the beginning of the world.' RM reads, 'who doeth these things which were known from the beginning of the world.'