וַיֻּגַּ֤ד לִשְׁלֹמֹה֙ לֵאמֹ֔ר הִנֵּה֙ אֲדֹ֣נִיָּ֔הוּ יָרֵ֖א אֶת־הַמֶּ֣לֶךְ שְׁלֹמֹ֑ה וְ֠הִנֵּה אָחַ֞ז בְּקַרְנ֤וֹת הַמִּזְבֵּ֙חַ֙ לֵאמֹ֔ר יִשָּֽׁבַֽע־לִ֤י כַיּוֹם֙ הַמֶּ֣לֶךְ שְׁלֹמֹ֔ה אִם־יָמִ֥ית אֶת־עַבְדּ֖וֹ בֶּחָֽרֶב׃
And it was told Solomon, saying: ‘Behold, Adonijah feareth king Solomon; for, lo, he hath laid hold on the horns of the altar, saying: Let king Solomon swear unto me first of all that he will not slay his servant with the sword.’
Read the Targum (classical Aramaic translation) of I Kings 1:51: Targum Onkelos and other Aramaic renditions, free online, no signup.