Amos 3:7
his secret—namely, His purpose hidden from all, until it is revealed to His prophets (compare Genesis 18:17). In a wider sense, God's will is revealed to all who love God, which it is not to the world (Psalms 25:14; John 15:15; John 17:25-26).
unto his servants—who being servants cannot but obey their Lord in setting forth His purpose (namely, that of judgment against Israel) (Jeremiah 20:9; Ezekiel 9:11). Therefore the fault which the ungodly find with them is groundless (I Kings 18:17). It aggravates Israel's sin, that God is not about to inflict judgment, without having fully warned the people, if haply they might repent.
