Vayakhel - Classical Rabbinic Interpretation - Exodus Chapter 36

Exodus Chapter 36

Doing the math implied by Exodus 36:4, Exodus 38:22, Joshua 14:7, and 1 Chronicles 2:19–20, the Gemara deduced that in earlier generations, a boy of eight could father children. Exodus 38:22 reports that “Bezalel, son of Uri, son of Hur, of the tribe of Judah, made all that the Lord had commanded Moses,” when they built the Tabernacle. And 1 Chronicles 2:19–20 reports that Caleb fathered the Hur who fathered Uri who fathered Bezalel. Exodus 36:4 reports that “wise men . . . wrought all the work of the Sanctuary,” so Bezalel must have been at least 13 years old to have been a man when he worked on the Tabernacle. A Baraita taught that Moses made the Tabernacle in the first year after the Exodus, and in the second, he erected it and sent out the spies, so the Gemara deduced that Bezalel must have been at least 14 years old when Moses sent out the spies, the year after Bezalel worked on the Tabernacle. And Joshua 14:7 reports that Caleb said that he was 40 years old when Moses sent him to spy out the land. Thus, the Gemara deduced that Caleb was only 26 years older than his great-grandson Bezalel. Deducting two years for the three pregnancies needed to create the three intervening generations, the Gemara concluded that each of Caleb, Hur, and Uri must have conceived his son at the age of eight. (Babylonian Talmud Sanhedrin 69b.)