(12) And they entered into a (the) covenant.—Jeremiah 34:10. The phrase means that they bound themselves by an oath (2Chronicles 15:14). Comp. Nehemiah 10:30.

To seek the Lord . . . with all their heart . . .—See the same phrase in Deuteronomy 4:29.

15:1-19 The people make a solemn covenant with God. - The work of complete reformation appeared so difficult, that Asa had not courage to attempt it, till assured of Divine assistance and acceptance. He and his people offered sacrifices to God; thanksgiving for the favours they had received, and supplication for further favours. Prayers and praises are now our spiritual sacrifices. The people, of their own will, covenanted to seek the Lord, each for himself, with earnestness. What is religion but seeking God, inquiring after him, applying to him upon all occasions? We make nothing of our religion, if we do not make heart-work of it; God will have all the heart, or none. Our devotedness to God our Saviour, should be avowed and shown in the most solemn and public manner. What is done in hypocrisy is a mere drudgery.Solemn renewals of the original covenant which God made with their fathers in the wilderness Exodus 24:3-8 occur from time to time in the history of the Jews, following upon intervals of apostasy. This renewal in the reign of Asa is the first on record. The next falls 300 years later in the reign of Josiah. There is a third in the time of Nehemiah (see the marginal references). On such occasions, the people bound themselves by a solem oath to observe all the directions of the Law, and called down God's curse upon them if they forsook it. 10-14. the third month—when was held the feast of pentecost. On this occasion, it was celebrated at Jerusalem by an extraordinary sacrifice of seven hundred oxen and seven thousand sheep, the spoil of the Ethiopians being offered. The assembled worshippers entered with great and holy enthusiasm into a national covenant "to seek the Lord their God … with all their heart and with all their soul;" and, at the same time, to execute with rigor the laws which made idolatry punishable with death (2Ch 15:13; De 17:2-5; Heb 10:28). The people testified unbounded satisfaction with this important religious movement, and its moral influence was seen in the promotion of piety, order, and tranquillity throughout the land. They entered into a covenant; they engaged themselves by a serious and solemn covenant before the Lord and this great assembly.

And they entered into a covenant,.... Asa and all his people; that is, as Piscator remarks, they went between the pieces of the calf cut asunder, for the confirmation of the covenant, see Jeremiah 34:18,

to seek the Lord God of their fathers, with all their heart, and with all their soul; to serve and worship him most truly, sincerely, and cordially.

And they entered into a covenant to seek the LORD God of their fathers with all their heart and with all their soul;