וַיֹּ֣אמֶר אַבְרָהָ֗ם אֶל־עַבְדּוֹ֙ זְקַ֣ן בֵּית֔וֹ הַמֹּשֵׁ֖ל בְּכָל־אֲשֶׁר־ל֑וֹ שִֽׂים־נָ֥א יָדְךָ֖ תַּ֥חַת יְרֵכִֽי׃
아브라함이 자기 집 모든 소유를 맡은 늙은 종에게 이르되 청컨대 네 손을 내 환도뼈 밑에 넣으라
Zohar
He calls him "servant" (masculine form), for the secret path to his Master's keys is in his hand. The same applies to the verse, "And Abraham said to the...servant," (Beresheet 24:2) who is the moon, as we have learned. (This is revealed through) Metatron, the servant messenger of his Master.
Reshit Chokhmah
“And keep all His statutes.” This is Hod, to beware of a harlot. 359. This agrees with what we have learned. Rabbi Yehuda said: It is written: “Gird your sword upon your thigh, O mighty warrior: your glory and your majesty” (Tehilim 45:4). This refers to he who makes haste to place the fear of the strong sharpened sword, WHICH IS MALCHUT, before him, upon the thigh. What is “upon your thigh”? It means upon this holy sign, to guard it, as is written: “Put, I pray you, your hand under my thigh” (Beresheet 24:2).