Degel Machaneh Ephraim

He made the camels kneel outside the city at evening time, at the time when the women go out to draw water. One may say in this an allusion, along the lines of what is found in the Zohar ha-Kadosh (the Holy Zohar), that they proclaim, "Go forth and see, O daughters of Zion, concerning King Solomon," and the Sitra Achra (Other Side) has no rest, and it is explained, etc., for the "Ben" (Son) above and the "Ben" below cannot [proceed] until it is pushed outside.

And this, one may say, is what the verse alludes to: "He made the camels kneel" — these are the dinim (judgments), along the lines of what is said, that one who sees a camel (gamal) in a dream, death has been decreed upon him, etc. "Vayavrech" (he made kneel) means that he drew the dinim and the kelipot (husks) outside the city — outside the Shechinah (Divine Presence), which is called "city," as in the expression "ir ve-kadish" (city and holy one).

And so it must be with every person: before one wishes to pray or to do anything in holiness for the sake of the yichud (unification) of the Holy One, blessed be He, and His Shechinah, one must clear one's mind of all extraneous thoughts and distractions, just as it is stated in the Zohar ha-Kadosh that they proclaim in the firmament, "Go forth and see," etc., and this precedes the yichud.

So too here, Eliezer had to clear away the kelipot from the realm of holiness before he wished to bring about the yichud of Yitzchak and Rivkah. And the maskil (the discerning one) will understand.