Tail in the Head
Declaring the end from the beginning, and from ancient times the things that are not yet done (Isaiah 46:10).
“Ten sefirot belimah (numerals of nothingness). Their measure is ten, yet infinite. There end is embedded in their beginning, their beginning in there end, like a flame joined to a burning coal” (Sefer Yetsirah 1:1-8).
“Gravings of engravings, like the appearance of a long serpent, extending here and there—tail in the head, head behind the shoulders, enraged and furious, guarded and hidden” (Zohar 2:176b).
“תָּלִי (Tali)—a spark rendered as an illusory serpent. Its tail clinging to orbs, surrounding them. In its might it darkens the planets” (Berit Menuḥa: Eight Vowel).