7. And they had no child By an extraordinary purpose of God it was appointed that John should be born out of the common and ordinary course of nature. The same thing happened with Isaac, (Genesis 17:17; Genesis 21:1,) in whom God had determined to give an uncommon and remarkable demonstration of his favor. Elisabeth had been barren in the prime of life, and now she is in old age, which of itself shuts up the womb. By two hinderances, therefore, the Lord gives a twofold, surprising exhibition of his power, in order to testify, by stretching out his hand, as it were, from heaven, that the Prophet was sent by himself, (Malachi 3:1; John 1:6.) He is indeed a mortal man, born of earthly parents; but a supernatural method, so to speak, recommends him strongly as if he had fallen from heaven