Tractate Gerim

If a man wishes to become a proselyte he is not accepted at once but they say to him, ‘Why do you want to become a proselyte? Do you not see that this people are debased, oppressed and degraded more than all other peoples, that diseases and chastisements come upon them and they bury their children and children’s children, that they are slaughtered for [observing] circumcision, immersion and the other precepts [of the Torah] and cannot hold up their heads like other peoples?’

If he says, ‘I am not worthy’, they dismiss him and he goes his way.

If, however, he undertakes [to become a proselyte], they take him down to the place of immersion, cover him in water up to his middle, and tell him some of the details of the precepts. [He is informed that he is accepted only] on condition that he will give gleanings, forgotten sheaves, the corner of the field and tithes.

As they say this to a man, so they say to a woman that [she is accepted] on condition that she will be particular in regard to niddah, ḥallah and the kindling of the Sabbath lamp.