Matthew 22:25

Now there were with us seven brethren ,.... That is, there was in the city, town or neighbourhood, where these Sadducees dwelt, probably at Jerusalem, a family, in which were seven sons, all brethren by the father's side; for brethren by the mother's side were not counted brethren, nor obliged by this law F1 Maimon. Hilch. Yebum, c. 1. sect. 7. ; whether this was a reigned case which is here and in the following verses put, or whether it was real fact, which is possible, it matters not: and the first, when he had married a wife, deceased, and having no issue, left his wife unto his brother: the eldest of these seven brethren married a wife, and after some time died, having no children, son or daughter, by his wife; and therefore, according to the above law, leaves her to his next brother to marry her, and raise up seed unto him; which, according to the Jewish canons F2 T. Bab. Erubin, fol. 47. 1. Maimon. ib. c. 1. sect. 19. , could not be done before ninety days, or three months after the decease of his brother; for so long they were to wait and see, whether she was with child by his brother or not; for if she was, it was not necessary, yea, it was unlawful for him to marry her.