[If one was] competent and [one was] a deaf-mute, [if] the yavam cohabited with the competent one and then with the deaf-mute, or his brother cohabited with the deaf-mute, he did not disqualify the competent one. [If] the yavam cohabited with the deaf-mute and then with the competent one, or if his brother [then] cohabited with the competent one, he disqualified the deaf-mute.