1 Kings 15:3

And he walked in all the sins of his father, which he had done before him [sins, i.e; from the theocratic standpoint. See 1 Kings 14:22 , 1 Kings 14:25 . It does not appear that either Abijah or Rehoboam was a vicious man, and from his pious language on Mount Zemaraim ( 2 Chronicles 13:10-12 ) we should certainly have thought that Abijah was a god-fearing prince. But 1 Kings 14:13 proves that he had sanctioned idolatry, and this was no doubt his principal sin, as the next words explain]: and his heart was not perfect with the Lord and his God, as the heart of David his father [the words used of Solomon. 1 Kings 2:4 ].