Kabbalah zu Könige I 18:31

Now, (in this world) it is (in the middle) between rising upward and descending downward, between Bethel, (Up) and Ay (Down). If it has merit, it will rise up "to the place of the altar, which he had made..." Who is 'he' who 'had made,' and what is 'the altar'? "He had made there" applies to the Holy One, blessed be He, who had made that altar and established it upon twelve stones, "according to the number of the tribes of the sons of Jacob, to whom the word of Hashem came, saying, Yisrael shall be your name" (I Kings 18:31), for sure.

Because he brought it back to its place, (i.e. he repaired Yesod and returned it to Malchut) all was healed! This is why it is written: "And he repaired the altar of Hashem that was broken down" - a reference to the covenant that had been forsaken. It is therefore written: "And Elijah took twelve stones, according to the number of the tribes of the sons of Jacob" (Ibid. 31), which alludes to the repair of the altar of Hashem.