Seven days before the Day of Atonement they removed the high priest from
his own residence to the chamber of the President, and appointed another
priest as his deputy in case he should meet with such an accident as
would incapacitate him from going through the service of the day. Rabbi
Yehudah says they also had to betroth him to another woman lest his own
wife should die meanwhile, for it is said, "And he shall make an
atonement for himself and for his house,"--his house, that is, his wife.
In reference to this precautionary rule it was observed, there might
then be no end to the matter (Rashi), should this woman die also.
THE TALMUD, _Yoma_, fol. 2, col. 1.