Melachim Alef 1:18

18 And now, hinei, Adoniyah reigneth as Melech; and now, adoni HaMelech, thou knowest it not;

Melachim Alef 1:18 Meaning and Commentary

1 Kings 1:18

And now, behold, Adonijah reigneth
Has set up himself as king, and is by some saluted as such; but lest it should be thought by David that she suggested by this that he was guilty of the breach of his oath, or on any account to be blamed, she adds:

and now my lord, O king, thou knowest [it] not;
which as it acquitted him from all blame, so it made the sin of Adonijah the more heinous, that he should do this without consulting his father about it; and was not only neglect of him as a father, and an act of disrespect and disobedience to him as such, but even of high treason, to assume the throne in his father's lifetime, without his consent.

Melachim Alef 1:18 In-Context

16 And Bat-Sheva bowed, and did obeisance unto HaMelech. And HaMelech said, What wouldest thou?

17 And she said unto him, Adoni, thou didst swear by Hashem Eloheicha unto thine amah, saying, Assuredly Sh’lomo thy ben shall reign as Melech after me, and he shall sit upon my kisse.

18 And now, hinei, Adoniyah reigneth as Melech; and now, adoni HaMelech, thou knowest it not;

19 And he hath sacrificed shor and fatted bull and tzon in abundance, and hath invited all the Bnei HaMelech, and Evyatar (Abiathar) HaKohen, and Yoav the Sar HaTzava; but Sh’lomo thy eved hath he not invited.

20 And thou, adoni HaMelech, the eyes of kol Yisroel are upon thee, that thou shouldest tell them who shall sit on the kisse adoni HaMelech after him.