These words are said to have been spoken by Joseph to his
brethren, who, after the death of their father Jacob, feared
lest Joseph should revenge himself upon them (Gen. l. 21). The
Midrash and the Targums as usual furnish much additional
Rav Assi said:--Nowadays, if a Gentile should betroth a Jewess, there is
reason for regarding the betrothal as not therefore invalid, for he may
be a descendant of the ten tribes, and so one of the seed of Israel.
THE TALMUD, _Yevamoth_, fol. 16, col. 2.