Ibrahim 14:7 واذ تاذن ربكم لين شكرتم لازيدنكم ولين كفرتم ان عذابي لشديد ٧
وَإِذۡ
تَأَذَّنَ
رَبُّكُمۡ
لَئِن
شَكَرۡتُمۡ
لَأَزِيدَنَّكُمۡۖ
وَلَئِن
كَفَرۡتُمۡ
إِنَّ
عَذَابِي
لَشَدِيدٞ
٧
その時主は（ムーサーの口を通じて）宣告された。「もしあなたがたが感謝するなら，われは必ずあなたがたに（対する恩恵を）増すであろう。だがもし恩恵を忘れるならば，わが懲罰は本当に厳しいものである。」
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Ibn Kathir (Abridged)
Allah states that Musa reminded his people about Allah's annals anddays and of Allah's favors and bounties that He bestowed on them,when He saved them from Fir` awn and his people and the tormentand disgrace they used to exert on them.
They used to slaughter whomever they could find among their sons
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