[3] This chapter belongs to the section focusing on the reign of Solomon over the unified kingdom of Judah and Israel (1 Kings 1 to 11).
[5] After a while, Adonijah began to 'dig his own grave' by lusting after Abishag the Shunammite, a dangerous move because 'she had, after all, lain in his father's bed', and 2 Samuel 16:20–22 indicate that having a sexual liaison with David's concubines was to legitimize Absalom's claim to the throne.
[5][16] Adonijah correctly recognized the power and influence of Bathsheba as the queen mother (shown in verse 19).
He failed to understand her intentions and character, as she seemed to support Adonijah's petition, yet slipped the phrase 'your brother' to awaken Solomon's fears.
[5] Interestingly, David did not mention Abiathar nor Adonijah in his last words, so the actions against them were solely Solomon's decision.
[5] Zadok (cf 2 Chronicles 1:8,10, 34, 39) became the sole high priest after the departure of Abiathar (verse 35).
[18] For his loyal service, Benaiah was appointed to Joab's post as army chief (verse 35).
[17] The king placed Shimei under housearrest, and would only be executed if he left his house with the addition of a seemingly reasonable requirement "not crossing the Wadi Kidron" on the east of Jerusalem.