וְכִֽי־יִמְכֹּ֥ר אִ֛ישׁ אֶת־בִּתּ֖וֹ לְאָמָ֑ה לֹ֥א תֵצֵ֖א כְּצֵ֥את הָעֲבָדִֽים׃
At kapag ipinagbili ng isang lalaki ang kanyang anak na babae bilang alilang babae, hindi siya lalaya gaya ng paglaya ng mga alipin.
Mishneh Torah, Marriage
A girl from the day of her birth until twelve complete years of age is called a minor and is [also] called a child. And even if she has grown several hairs within this time, they are merely like a mole. But if she has grown two hairs below on her body in places known for hair growth, and she is [at least] twelve years and one day old or more, she is called a young woman.
Mishneh Torah, Marriage
The growth of two hairs during this time is called the “lower sign”. After the appearance of the lower sign, she is called a young woman for the next six complete months. And from the day beginning the conclusion of [these] six months and afterwards, she is called a woman of age. The length of time between becoming a young woman and a woman of age is only six months.