Solomon anointed king

King David had several wives and concubines by which he had son's and daughters. Because of his sin with Bathsheba, having her husband killed in battle to cover his sin with her, his family was troubled with sin. Absalom had tried to steal the kingdom from David, taking David's concubines to himself and causing a civil war splitting northern Israel from Judah. General Joab killed Absalom against King David's command. Israel and Judah were reunited but now Joab  and Abiathar the priest, had supported the oldest son of David Adonijah in a power grab. King David was very old and unaware of what was happening. Nathan the prophet approached Bathsheba and Bathsheba went to king David to have him declare her son Solomon as king instead of Adonijah.

1 Ki 1:32  And king David said, Call me Zadok the priest, and Nathan the prophet, and Benaiah the son of Jehoiada. And they came before the king.
1 Ki 1:33  The king also said unto them, Take with you the servants of your lord, and cause Solomon my son to ride upon mine own mule, and bring him down to Gihon:
1 Ki 1:34  And let Zadok the priest and Nathan the prophet anoint him there king over Israel: and blow ye with the trumpet, and say, God save king Solomon.
1 Ki 1:35  Then ye shall come up after him, that he may come and sit upon my throne; for he shall be king in my stead: and I have appointed him to be ruler over Israel and over Judah.
1 Ki 1:36  And Benaiah the son of Jehoiada answered the king, and said, Amen: the LORD God of my lord the king say so too.
1 Ki 1:37  As the LORD hath been with my lord the king, even so be he with Solomon, and make his throne greater than the throne of my lord king David.

Solomon's half brother Adonijah had grabbed the horns of the altar begging for mercy, as the custom was to kill the rivals of a king. Solomon gave his half brother mercy but with a condition, he was not to seek power to be king again. Later Adonijah approached Bathsheba with a request, that she would ask Solomon to give to him the virgin wife of King David. The virgin kept old king David warm and had comforted him. When Bathsheba asked King Solomon to grant his request, Solomon considered this a power grab. Taking a wife of David would give him political power. Solomon had Adonijah killed for this transgression.

The old testament was showing us how the law works. No one could keep all the law and even one transgression would result in death. Solomon was given wisdom from God, the wisest of men. He too would become a law breaker having too many foreign wives. He made shrines to their gods and worshiped at them. Even the wisest of men will sin. We need a savior to give us mercy and grace. Our nation needs righteous leaders and laws until each person comes to Jesus to be given grace and a new heart. The law shows to us sin and the result is death. Jesus came with God's mercy and grace becoming our substitute, dying in our place, to give us eternal life. Jesus became the eternal wisest and most righteous king to sit on the throne of David  and to sit at the right hand of God the Father forever.