1 Kings 1:50 KJV

And Adonijah feared because of Solomon, and arose, and went, and caught hold on the horns of the altar.

Solomon is anointed king, and Adonijah's usurpation stoppedThe people expressed great joy and satisfaction in the elevation of Solomon. Every true Israelite rejoices in the exaltation of the Son of David....

1 Kings 2:28 Then tidings came to Joab: for Joab had turned after Adonijah, though he turned not after Absalom. And Joab fled unto the tabernacle of the LORD, and caught hold on the horns of the altar.
Exodus 21:14 But if a man come presumptuously upon his neighbour, to slay him with guile; thou shalt take him from mine altar, that he may die.
Exodus 27:2 And thou shalt make the horns of it upon the four corners thereof: his horns shall be of the same: and thou shalt overlay it with brass.
Exodus 38:2 And he made the horns thereof on the four corners of it; the horns thereof were of the same: and he overlaid it with brass.
Psalms 118:27 God is the LORD, which hath shewed us light: bind the sacrifice with cords, even unto the horns of the altar.

From OpenBible.info, most relevant first.

AdonijahMy Lord is Jehovah. (1.) The fourth son of David (2 Sam 3:4). After the death of his elder brothers, Amnon and Absalom, he became...
SolomonPeaceful, (Heb. Shelomoh), David’s second son by Bathsheba, i.e., the first after their legal marriage (2 Sam 12:1–31). He was probably...

And Adonijah וַאֲדֹנִיָּהוּ waʾădōniyyāhû אֲדֹנִיָּה Proper name · with and
feared יָרֵא yārēʾ יָרֵא Verb · qal perfect, third person masculine singular
because מִפְּנֵי mippĕnê פָּנִים Noun · masculine or feminine plural construct · with preposition
of Solomon שְׁלֹמֹה šĕlōmô שְׁלֹמֹה Proper name
and arose וַיָּקָם wayyāqām קוּם Verb · qal sequential imperfect, third person masculine singular · with and
and went וַיֵּלֶךְ wayyēlek יָלַךְ Verb · qal sequential imperfect, third person masculine singular · with and
and caught hold וַיַּחֲזֵק wayyaḥăzēq חָזַק Verb · hiphil sequential imperfect, third person masculine singular · with and
on the horns בְּקַרְנוֹת bĕqarnôt קֶרֶן Noun · masculine or feminine plural construct · with preposition
of the altar הַמִּזְבֵּחַ hammizbēaḥ מִזְבֵּחַ Noun · masculine singular · with the

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