Deut 23:17. Sex outside of marriage is forbidden. So the "there shall be no whores and sodomites..." verse seems to cover it. There is another though. I'm sure I've seen it before.
"Whores" and "harlots" are women who have sex for money. So prostitution is forbidden. That is not the same thing as female homosexuality. "Sodomites" again refers to men only, reinforcing that homosexuality is particularly forbidden to males.