﴿ وَلَقَدْ عَلِمْتُمُ ٱلَّذِينَ ٱعْتَدَوْا۟ مِنكُمْ فِى ٱلسَّبْتِ فَقُلْنَا لَهُمْ كُونُوا۟ قِرَدَةً خَٰسِـِٔينَ ﴾

“for you are well aware of those from among you who profaned the Sabbath, whereupon We said unto them, "Be as apes despicable!"”

And verily wa-la-qad the lām is for oaths you know that there were those among you who transgressed violated the Sabbath by fishing when We had forbidden you to do so — these were the inhabitants of Eilat — and We said to them ‘Be apes despised!’ rejected and they became so they died three days later.