The Jews breach the Sanctity of the Sabbath

Allah said,

وَلَقَدْ عَلِمْتُمُ

This episode belongs to the time of Sayyidna Dawud (David (علیہ السلام Allah had appointed Saturday as the Sabt سبت ، or the sacred day, for the Israelites; it was specially set apart for prayers and worship, and hence fishing was prohibited on this day. But these people lived on the sea-shore, and were very fond of fish. Al-Qurtubi says that the Israelites, at first, invented all sorts of clever pretences for catching fish on Saturday, and gradually started doing so openly. There now grew a division amongst them on this point. On the one hand were these transgressors, and, on the other, some scholars and pious men who tried to dissuade them from such disobedience. When the former paid no heed to them, the latter broke away altogether from the sinners, and began to live in a separate part of the town. One day they felt no sound was coming from the other part of the town. Growing curious, they went there and found that all the transgressors had been changed into apes. Qatadah says that the young ones had become apes, and the old ones swine. The apes could recognize their relatives and friends, and would approach them weeping out of remorse, and seeking their sympathy and help. Then all of them died after three days.

As to the question whether the apes and the swine we see today bear any kinship to these Israelites who had been metamorphosed, the correct position is that people who have been metamorphosed into beasts by Allah as a punishment cease to breed, and leave no progeny behind. According to a hadith reported by Imam Muslim from the blessed Companion ` Abdullah ibn Masud ؓ some people asked the Holy Prophet ﷺ whether the apes and the swine were the descendants of the metamorphosed Jews. The Holy Prophet reminded them that apes and swine existed in the world even before, and said that when Allah sends down this particular kind of punishment on a people, the race comes to an end with this, and there is no further breeding.24