וַיְבָרֲכ֤וּ אֶת־רִבְקָה֙ וַיֹּ֣אמְרוּ לָ֔הּ אֲחֹתֵ֕נוּ אַ֥תְּ הֲיִ֖י לְאַלְפֵ֣י רְבָבָ֑ה וְיִירַ֣שׁ זַרְעֵ֔ךְ אֵ֖ת שַׁ֥עַר שֹׂנְאָֽיו׃
리브가에게 축복하여 가로되 우리 누이여 너는 천만인의 어미가 될지어다 네 씨로 그 원수의 성문을 얻게 할지어다
Tractate Kallah
A Kallah is forbidden to her husband without Birchas Chasanim in the same manner as a Niddah. Just as a Niddah who has not immersed [In Mikva] is forbidden to her husband, so likewise is a Kallah forbidden to her husband without the [marriage] brachah. From where do we know Birchas Chasanim is derived from the Torah? As it said, “And they blessed Rivkah...” (Bereshis 24:60). From where do we derive that even a widow is forbidden? As it is said, “He then took ten elders of the city…Then all the people who were at the gate, said, [we are] witnesses!...May HASHEM make the woman...May your house be like the house of Peretz...” (Rus 4:11-12, 2).