Tosefta for Yevamot 14:2

[If] his deaf-mute daughter was married to his mentally competent brother, her rival wife is subject to chalitzah but not yibbum. A deaf-mute (f.) who was married off by her father, behold, she is [treated] like one who is mentally competent in every respect. The mentally competent daughter of an Israelite who was married to a deaf-mute priest does not eat of terumah. [If] she became pregnant, she may not eat. [If] she gave birth, she may eat. [If] the fetus [was miscarried and] was cut up in her womb, she may eat. The deaf-mute daughter of an Israelite who was married to a mentally competent priest may not eat of terumah. [If] she became pregnant, she may not eat. [If] she gave birth, she may eat.