sons of Levi, the four grandsons of Judah and Benjamin, and those grandsons of Jacob who probably died without leaving any male posterity, since their descendants are not mentioned among the families of Israel, there remain 41 grandsons of Jacob who founded families, in addition to the Levites. Now, if we follow 1Ch 7:20., where ten or eleven generations are mentioned between Ephraim and Joshua, and reckon 40 years as a generation, the tenth generation of the 41 grandsons of Jacob would be born about the year 400 of the sojourn in Egypt, and therefore be over 20 years of age at the time of the Exodus. Let us assume, that on an average there were three sons and three daughters to every married couple in the first six of these generations, two sons and two daughters in the last four, and we shall find, that in the tenth generation there would be 478,224 sons about the 400th year of the sojourn in Egypt, who would therefore be above 20 years of age at the time of the Exodus, whilst 125,326 men of the ninth generation would be still living, so that there would be 478,224 + 125,326, or 603,550 men coming out of Egypt, who were more than 20 years old. But though our calculation is based upon no more than the ordinary number of births, a special blessing from God is to be discerned not only in this fruitfulness, which we suppose to have been uninterrupted, but still more in the fact, that the presumed number of children continued alive, and begot the same number of children themselves; and the divine grace was peculiarly manifest in the fact, that neither pestilence nor other evils, nor even the measures adopted by the Pharaohs for the suppression of Israel, could diminish their numbers or restrain their increase. If the question be asked, how the land of Goshen could sustain so large a number, especially as the Israelites were not the only inhabitants, but lived along with Egyptians there, it is a sufficient reply, that according to both ancient and modern testimony (cf. Robinson, Pal. i. p. 78), this is the most fertile province in all Egypt, and that we are not so well acquainted with the extent of the territory inhabited by the Israelites, as to be able to estimate the amount of its produce.
verses 38-39
In typical fulfilment of the promise in Gen 12:3, and no doubt induced by the signs and wonders of the Lord in Egypt to seek their good among the Israelites, a great crowd of mixed people (רב ערב) attached themselves to them, whom Israel
