Numbers in Birkat Kohanim
In Birkat Kohanim, the first line has 3 words, the second line 5 words, and the last line 7 words. The steps the kohanim descended from the altar in the Temple were the same numbers. We know that those numbers add up to 15, the numerical equivalent of a Hebrew Divine name, Yod Hey. Centuries later, those numbers were repeated in the Tower of London of all places. What is the origin of these numbers?