By the words, opening the womb, he signifies the first-born both of man and beast, and each one of which was, according to the commandment, to be called holy to the Lord, and therefore to become the property of the priest, that is, so far that he was to receive a price for every first-born of man, and oblige every unclean animal to be ransomed.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).