“אֱלֹהִים יְהִי מְאֹרֹת בִּרְקִיעַ (Elohim yehi me’orot bi-reqi’a), God said let there be luminaries in the firmament (Genesis 1:14)—עִתִּים (ittim), times” (Ba’al ha-Turim).
And God made the two great lights, the great light for dominion of day and the small light for dominion of night (Genesis 1:17–18).
Like the moon firm-founded forever—and the witness in the skies is faithful (Psalms 89:38).
He made the moon for the fixed seasons (Psalms 104:19).
“Rabbi Levi said in the name of Rabbi Yose son of Ila’i, ‘It is natural that the great should calculate by the great, and the small by the small. Esau calculates by the sun, which is large, and Jacob by the moon, which is small.’ Rabbi Naḥman said, ‘That is a happy presage. Esau calculates by the sun, which is large: just as the sun rules by day but not by night, so does Esau have a share in this world, but has no share in the world to come. Jacob calculates by the moon, which is small: just as the moon rules by day and by night, so Jacob has a share in this world and in the world to come!’” (Bereshit Rabbah 6:3).
“Calculation of all is by the moon” (Zohar 1:46b).
“Rabbi Yose said, ‘It is written: one by one to find חֶשְׁבּוֹן (ḥeshbon), a reckoning (Ecclesiastes 7:27). The reckoning of גִימַטְרִייאוֹת (gimatriyyot), numerologies, abiding in the Moon—on which rung of Hers are they found? [Rabbi Abba] did not reply. Then he said, ‘I have heard, but don’t remember the matter.’
That shade [the spirit of Rabbi Pinḥas son of Ya’ir] rose and slapped Rabbi Abba’s eyes. He fell on his face out of fear. While he was on his face, a verse fell into his mouth: Your eyes, pools בְּחֶשְׁבּוֹן (be-ḥeshbon), in Heshbon, by the gate of the daughter of nobles (Song of Songs 7:5). These eyes of Hers are פַּרְפְּרָאוֹת (parpera’ot), savories, within supernal Wisdom [see M Avot 3:18], drawn from above; and by חֶשְׁבּוֹן (ḥeshbon), reckoning, solstices, equinoxes, and intercalations, they are filled, becoming pools, waters flowing in all directions—those eyes! Until they amount to every reckoning of the moon outside, and stars and constellations, making a reckoning. This is by the gate of Bath Rabbim—the moon outside” (Zohar 3:220b).
“Releasing those pools of water, carefully releasing all by accounting” (Zohar 3:223a).
“Blessing is not found in anything weighed, measured, or counted” (BT Ta’anit 8b).