Amo 6:1-14. Denunciation of both the sister nations (especially their nobles) for wanton security - Zion, as well as Samaria: Threat of the exile: Ruin of their palaces and slaughter of the people: Their perverse injustice.
named chief of the nations - that is, you nobles, so eminent in influence, that your names are celebrated among the chief nations [Ludovicus De Dieu]. Hebrew, “Men designated by name among the first-fruits of the nations,” that is, men of note in Israel, the people chosen by God as first of the nations (Exo 19:5; compare Num 24:20) [Piscator].
to whom ... Israel came - that is, the princes to whom the Israelites used to repair for the decision of controversies, recognizing their authority [Maurer]. I prefer to refer “which” to the antecedent “Zion” and “Samaria”; these were esteemed “chief” strongholds among the heathen nations “to whom ... Israel came” when it entered Canaan; Amo 6:2 accords with this.