"Every food was lawful to the Children of Israel except what...
"Every food was lawful to the Children of Israel except what Israel (Jacob) had forbidden to himself before the Torah was sent down. Say: 'Bring you hither then the Torah and read it, if you are truthful'." It is cited in some books that the Children of Israel raised objections to the Prophet of Islam (S) that if his teachings were adopted to the teachings of the former prophets, such as Abraham, Moses, and Issac (as), why he (S) did not decree meat and milk of camel unlawful.
In answer to them, this verse was revealed saying that all kinds of food were lawful to the Israelites, but it was the Israel himself that made some of foods unlawful for himself. "Every food was lawful to the Children of Israel except what Israel (Jacob) had forbidden to himself before the Torah was sent down.
Say: 'Bring you hither then the Torah and read it, if you are truthful'." The reason for this treatment, as it has been mentioned in some authentic books, is that whenever Israel consumed these kinds of food (meat of camel, for example), they were harmful for him and caused him to be physically unhealthy.
"So, whoever invents a lie against Allah after that, they are unjust." In this verse, it says: now that they are not ready to bring the Torah and their false allegation unto Allah has been proved, they should know that, after this, those who invent a lie against Allah are unjust, because they know it and they commit such wrong intentionally.