I Kings 2
1-4 Now the days of David drew nigh that he should die; and he charged Solomon his son, saying,
I go the way of all the earth: be thou strong therefore, and shew thyself a man;
And keep the charge of the LORD thy God, to walk in HIS ways, to keep HIS statutes, and HIS commandments, and HIS judgments, and HIS testimonies, as it is written in the law of Moses, that thou mayest prosper in all that thou doest, and whithersoever thou turnest thyself:
That the LORD may continue HIS word which HE spake concerning me, saying, If thy children take heed to their way, to walk before ME in truth with all their heart and with all their soul, there shall not fail thee (said he) a man on the throne of Israel.
10-12 So David slept with his fathers, and was buried in the city of David.
And the days that David reigned over Israel were forty years: seven years reigned he in Hebron, and thirty and three years reigned he in Jerusalem.
Then sat Solomon upon the throne of David his father; and his kingdom was established greatly.
13-46 And Adonijah the son of Haggith came to Bathsheba the mother of Solomon. And she said, Comest thou peaceably? And he said, Peaceably.
He said moreover, I have somewhat to say unto thee. And she said, Say on.
And he said, Thou knowest that the kingdom was mine, and that all Israel set their faces on me, that I should reign: howbeit the kingdom is turned about, and is become my brother's: for it was his from the LORD.
And now I ask one petition of thee, deny me not. And she said unto him, Say on.
And he said, Speak, I pray thee, unto Solomon the king, (for he will not say thee nay,) that he give me Abishag the Shunammite to wife.
And Bathsheba said, Well; I will speak for thee unto the king.
Bathsheba therefore went unto king Solomon, to speak unto him for Adonijah. And the king rose up to meet her, and bowed himself unto her, and sat down on his throne, and caused a seat to be set for the king's mother; and she sat on his right hand.
Then she said, I desire one small petition of thee; I pray thee, say me not nay. And the king said unto her, Ask on, my mother: for I will not say thee nay.
And she said, Let Abishag the Shunammite be given to Adonijah thy brother to wife.
And king Solomon answered and said unto his mother, And why dost thou ask Abishag the Shunammite for Adonijah? ask for him the kingdom also; for he is mine elder brother; even for him, and for Abiathar the priest, and for Joab the son of Zeruiah.
Then king Solomon sware by the LORD, saying, God do so to me, and more also, if Adonijah have not spoken this word against his own life.
Now therefore, as the LORD liveth, which hath established me, and set me on the throne of David my father, and who hath made me an house, as he promised, Adonijah shall be put to death this day.
Wisdom: For if Adonijah is going to go behind Solomon's back to try to get what he wants from Solomon's own mother, what else will he do? He will be constant trouble and disruption. Solomon takes swift action to put an end to this and to hold onto peace. Also Adonijah was the brother who went behind David's back to try to get to be king. So Adonijah had a pattern of sneaking about to get what he wanted and Solomon had to have known this about him. Adonijah sealed his fate by going to Solomon's mother.