The Song of Songs. It is one of the five "megillos" ("scrolls") contained in the Kesuvim (Writings) section of Tanach. Written by King Shlomo (Solomon) it uses the allegory of love between Man and Woman to express the love between G-d and Man.
In the entire Tanach the moon is generally called Yareach. There are 3 instances where it is called Levana. One is ישעיהו: כד. כג.
וחפרה הלבנה ובושה החמה. Another one is ישעיהו: ל. כו.
והיה אור הלבנה ...