Matthew 19:3

Is it lawful? Here again the Pharisees, ever anxious to ensnare Jesus in his words, come to him and ask him, is it lawful for a man to put away his wife for every cause? Thinking now they had to a certainty succeeded, they argue thus with themselves: shall he say that it is not lawful, we will accuse him of blasphemy, contradicting the Scriptures. For, it is written, Deuteronomy iv. 1. If a man take a wife, and she find not favour in his eyes, for some uncleanness, he shall write a bill of divorce. And Malachias, ii. 16. When thou shalt hate her, put her away. --- On the other hand, if he shall say it is lawful, we will accuse him of favouring the passions. But Jesus Christ, the wisdom of the eternal Father, silences them with the authority of that Scripture they attempted to bring against him. What God has joined together, let no man put asunder; intimating, that the connexion between husband and wife is so strict, that by it they become as one flesh, and can no more be separated than one member from another. (Denis the Carthusian) --- To put away his wife for every cause, [1] or upon every occasion. They did not doubt it, if the cause was considerable. (Witham)

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Quacunque ex causa, Greek: kata pasan aitian, ex qualibet causa.