They clave to their brethren, their nobles,.... Who had signed and sealed the covenant, they declared their approbation of it, attended to it, and ratified what they had done in their name:
and entered into a curse, and into an oath, to walk in God's law, which was given by Moses the servant of God; they bound themselves with an oath that they would keep the law of God, and added a curse or imprecation on themselves to it should they break it; or, according to Piscator, they went into the space between the two pieces of the calf, which they cut asunder for the confirmation of the covenant, and so they cursed themselves if they should break it, see Jeremiah 34:18
and to observe and do all the commandments of the Lord our God, and his judgments and his statutes; all the laws, moral, ceremonial, and judicial; this they engaged to do in general; some particulars follow.