A pillar. Probably one of the great bronze pillars (see 1 Kings 7:15, 21). According to Ezekiel’s ritual for royal worship in the restored kingdom, the prince should “stand by the post of the gate” (Eze. 46:2).
Made a covenant. This was a renewal of the covenant that the Lord made with Israel at Sinai, whereby the people had agreed to obey the Lord and walk in His ways (Ex. 19:5-8; 24:3-8). The nation had broken that covenant and thus had forfeited the promises the Lord had made. A renewal of blessing could come only from a renewal of the covenant, and it was thus that Josiah made this solemn agreement before God to keep His commandments and to abide by the covenant made between God and His people at Sinai.
Stood to the covenant. The people took their stand for God, signifying their acceptance of the terms of the covenant and pledging their loyalty to Jehovah.