A bloody husband thou art, because tunc illa dixit, Sponsus sanguinum
HARMONY OF THE LAW · VOLUME 1 son's death, when everything else had been tried in vain. The meaning is, then, that the obstinacy of the tyrant must not prevent Moses from pressing him even to this final act. Therefore this injunction was an exhortation to perseverance; as appears from the context, when God declares that he will punish the obstinacy of the tyrant, because he refused to obey the command to let the people go. Moreover, since this denunciation was very severe, and might very greatly awaken the tyrant's wrath, therefore Moses is thus early commanded to prepare himself lest he should fail in this particular.
Exodus 4:24-31
24. And it came to pass by the way in the inn, that the Lord met him, and sought to kill him.
24. Accidit autem in itinere, in hospitio, ut occurreret ei Jehova, et quaereret occidere eum.
25. Then Zipporah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me.
25. Et tulit Sephora lapidem (vel, gladium) acutum, et amputavit praeputium filii sui, et projecit ad pedes ejus: ac dixit, Certe sponsus sanguinum tu mihi es.
26. So he let him go: then she said, A bloody husband thou art, because of the circumcision.
26. Et quum discederet ab illo, tunc illa dixit, Sponsus sanguinum ob circumcisionem.
27. And the Lord said to Aaron, Go into the wilderness to meet Moses. And he went, and met him in the mount of God, and kissed him.
27. Dixit autem Jehova ad Aharon, Vade in occursum Mosi in desertum. Profectus est igitur, et occurrit ei in monte Dei, et osculatus est eum.
28. And Moses told Aaron all the words of the Lord who had sent him, and all the signs which he had commanded him.
28. Et indicavit Moses Aharoni omnia verba Jehovae qui miserat eum, et omnia signa quae mandaverat ei.