SEV Biblia, Chapter 15:3 Y anduvo en todos los pecados de su padre, que había hecho éste antes de él; y no fue su corazón perfecto con el SEÑOR su Dios, como el corazón de David su padre.
Clarke's Bible Commentary - 1 Kings 15:3 Verse 3. His heart was not perfect] He was an idolater, or did not support the worship of the true God. This appears to be the general meaning of the heart not being perfect with God.
John Gill's Bible Commentary Ver. 3. And he walked in all the sins of his father, which he had done before him , etc.] Having such bad examples as both parents to copy after; it chiefly respects idolatrous practices, (see 1 Kings 14:23), and his heart was not perfect with the Lord his God ; he did profess the true God, and worshipped him, but not wholly, and only, and sincerely; he worshipped other gods besides him: and so his heart was not as the heart of David his father ; who was a sole and sincere worshipper of God, never departed from him and his service.
Matthew Henry Commentary Verses 1-8 - Abijam's heart was not perfect with the Lord his God; he wante sincerity; he began well, but he fell off, and walked in all the sin of his father, following his bad example, though he had seen the ba consequences of it. David's family was continued as a lamp in Jerusalem, to maintain the true worship of God there, when the light of Divine truth was extinguished in all other places. The Lord has stil taken care of his cause, while those who ought to have been serviceabl thereto have lived and perished in their sins. The Son of David wil still continue a light to his church, to establish it in truth an righteousness to the end of time. There are two kinds of fulfilling the law, one legal, the other by the gospel. Legal is, when men do all things required in the law, and that by themselves. None ever thu fulfilled the law but Christ, and Adam before his fall. The gospe manner of fulfilling the law is, to believe in Christ who fulfilled the law for us, and to endeavour in the whole man to obey God in all his precepts. And this is accepted of God, as to all those that are in Christ. Thus David and others are said to fulfil the law.
Original Hebrew וילך 1980 בכל 3605 חטאות 2403 אביו 1 אשׁר 834 עשׂה 6213 לפניו 6440 ולא 3808 היה 1961 לבבו 3824 שׁלם 8003 עם 5973 יהוה 3068 אלהיו 430 כלבב 3824 דוד 1732 אביו׃ 1