سورة الأعراف

The Messenger of Allah (peace be upon him and his family): Allah does not leave any offspring or descendants [and children and progeny] for a thing that has been transformed (through maskh).

Imam Sadiq (peace be upon him): The Jews were commanded to fast on Friday, but they abandoned this command and fasted on Saturday instead; because of this, fishing on Saturday was made unlawful for them.

Imam Sadiq (peace be upon him) was asked about the jirri fish (a species of fish that is long like a snake and has no bones other than the skull and the spine). He said: "Allah the Mighty and Majestic transformed a group from the Children of Israel, and whatever of them was taken from the sea — the jirri, the zimmir, the eel (mar-mahi) and other such fish — was of this category."

Imam Kazim (peace be upon him) said: "The apes (those who were transformed) were the very Jews who transgressed on the Sabbath [defying the divine command not to fish on that day], and Allah transformed them into apes."