זוהר ויקרא — דף י ע”ב

The passage treats the secret of the letter Yud of the Holy Name, joined to three points — the supreme crown, a hidden head, and the spring watering the garden. From the Yud comes the Hei (the river, the secret of Binah), and from them come two "children" — the Vav (the son, the secret of Tiferet) and the final Hei (the daughter, nourished by the Vav) — completing the construction of the Holy Name. From this Yud ten holy names unfold, and the passage begins to detail them, the first being Yah and the second YHVH.