Exodus 4:26

So he let him go; or, he, i.e. God, or the destroying angel sent from God, departed from him, i.e. from Moses, and removed the tokens of God's indignation, the sickness or stroke laid upon him. Zipporah both repeats and amplifies her former censure, and reproacheth not only her husband, but also God's ordinance; which perverse and obstinate spirit her husband observing in her, and wisely forecasting how much disturbance she might give him in his great and difficult work in Egypt, he thought fit to send her and her children back to her father, as appears from Exodus 18:1. In the Hebrew it is, because of the circumcisions, to wit, of her two sons, who possibly were both circumcised at this time, though it be not so expressed; but one being mentioned for an example, we are left to suppose the like concerning the other; or the circumcision of this child brings the other to her remembrance, and so she upbraids him with both. Only this doth more provoke her than it seems the other did, because she was forced to do this speedily, and with her own hands, and that to a tender infant; whereas the elder peradventure was circumcised when he was more grown and strong, and able to bear the pain. Let none think it strange that Zipporah should quarrel so much at circumcision, because the Midianites were descended from Abraham, and therefore were circumcised. For if they were so, it was done when they were grown up, about the thirteenth year of their age, from the example of Ishmael, who was circumcised at that age. But indeed it is more likely that those people, being cast out of God's covenant, as to the benefit of it, would, and did in a little time, throw off the sign of it, as having much more of pain and danger in it, than of use and privilege.