-->
Lit., "on a day when they did not keep Sabbath". Under Mosaic Law, they were obliged to refrain from all work - and, therefore, also from fishing - on Sabbath-days, with the result that the fish were more plentiful and would come closer to the shore on those days: and the inhabitants of the town took this as an excuse to break the Sabbath-law. Since the Qur'an does not mention the name of the town nor give any indication as to the historical period in which those offences were committed, it may be assumed that the story of the Sabbath-breakers (alluded to in several places in the Qur'an) is a general illustration of the tendency, so often manifested by the children of Israel, to offend against their religious laws in pursuit of their passions or for the sake of worldly gain. Although, according to the teachings of Islam, the Mosaic dispensation has since been abrogated, the Qur'an frequently points out its great role in the history of man's monotheistic beliefs, and stresses again and again its (time-bound) importance as a means of enforcing spiritual discipline on the children of Israel. Their repeated, deliberate breaches of the Mosaic Law are shown as evidence of their rebellious attitude towards that discipline and, thus, towards God's commandments in general.
The people of Aylah, an ancient town by the Red Sea, were forbidden to catch fish on the Sabbath. However, on Saturdays fish were everywhere, whereas on weekdays no fish were seen. To get around the prohibition, some decided to lay their nets on Fridays and collect the fish caught in their nets on Sundays. Those opposed to this practice were divided into two groups: one group tried to convince the offenders to honour the Sabbath, but soon gave up when their advice was not taken seriously. The second group was persistent in giving advice to the Sabbath-breakers. Eventually, the Sabbath-breakers were punished whereas the other two groups were saved.
Cf. ii. 65 and n. 79. Fishing, like every other activity, was prohibited to Israel on the Sabbath day. As this practice was usually observed, the fish used to come up with a sense of security to their water channels or pools openly on the Sabbath day, but not on other days when fishing was open. This was a great temptation to the law-breakers, which they could not resist. Some of their men of piety protested, but it had no effect. When their transgressions, which we may suppose, extended to other commandments, passed beyond bounds, the punishment came.