Reference for Kiddushin 7:20

מתקיף לה מר בר רב אשי ולאו ק"ו הוא ומה סימנין שאין מוציאין מרשות אב מוציאין מרשות אדון בגרות שמוציאה מרשות אב אינו דין שמוציאה מרשות אדון

and then added the other, sakir would be something which might be inferred a minori; and a thing which is derived a minori Scripture [often] takes the trouble to write. But here [in the case of a maidservant] she is only one person: having departed in na'aruth, what business has she with him in bagruth? - But, said Abaye, it is necessary only for the majority of a [constitutionally] barren woman:<span class="x" onmousemove="('comment',' She has no symptoms of na'aruth, and attains her majority (bagruth) at the age of twenty.');">²⁶</span>

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