Matthew Poole and continuators on Exodus 23:26

26 There shall nothing cast their young, nor be barren in thy land: the number of thy dayes I will fulfill .

Here was a double mercy. God gave them strength both to conceive, and to retain the conception, till the natural and proper time of bringing forth came.

I will preserve thee so as thou shalt live as long as the course of nature and temper of thy body will permit, when evil men shall not live out half their days. Psal. 55. 23.

Marginal references: Deut. 7. 14.