en_tn/amo/01/13.md

For three sins of ... even for four

This is a poetic device. It does not mean that a specific number of sins had been committed, but indicates that many sins had led to God's judgment. See how you translated these words in Amos 1:3.

I will not turn away punishment

Yahweh uses two negatives here to emphasize that he would punish them. See how you translated these words in Amos 1:3. (See: rc://en/ta/man/jit/figs-litotes)

enlarge their borders

"extend their boundaries" or "expand their territory"