Kabbalah zu Mischlej 25:78

Another reason for Keri is explained by what it says in the Torah “Then if you walk contrary (lit. Keri) to me and will not listen to me, I will continue striking you, sevenfold for your sins…then I will walk contrary (lit. Keri) to you in fury” (Leviticus 26:21-28). Rashi explains about this: Our teachers said that “Keri” here means ‘casual’, meaning by chance or something that happens sometimes, as if to say “if you are casual with my precepts”. And Menachem [Ben Saruk] explains “Keri” means and expression of ‘holding back’, which is similar to “Hokar Raglecha” (hold back your foot; Proverbs 25:17), and “Yekar Ruach” (withheld of spirit; Proverbs 17:27). This is also similar to Onkelos’s translation, which he explained it to mean “hardness” since they hardened their hearts to hold themselves back from bringing themselves close to Me. Both of these explanations come to one conclusion.