Jamieson, Fausset and Brown on Amos 7:13

13. prophesy not again--(Am 2:12).

at Beth-el--Amaziah wants to be let alone at least in his own residence.

the king's chapel--Beth-el was preferred by the king to Dan, the other seat of the calf-worship, as being nearer Samaria, the capital, and as hallowed by Jacob of old (Ge 28:16, 19; 35:6, 7). He argues by implication against Amos' presumption, as a private man, in speaking against the worship sanctioned by the king, and that in the very place consecrated to it for the king's own devotions.

king's court--that is, residence: the seat of empire, where the king holds his court, and which thou oughtest to have reverenced. Samaria was the usual king's residence: but for the convenience of attending the calf-worship, a royal palace was at Beth-el also.