Prohibiting the Ideas of the Disbeleivers about Death and Predestination

Allah forbids His believing servants from the disbelievers' false creed, seen in their statement about those who died in battle and during travel; "Had they abandoned these trips, they would not have met their demise." Allah said,

يأَيُّهَا الَّذِينَ ءَامَنُواْ لاَ تَكُونُواْ كَالَّذِينَ كَفَرُواْ وَقَالُواْ لإِخْوَنِهِمْ

The saying of the hypocrites in verse 156 here is an extension of what was cited in verse 154 earlier: لَوْ كَانَ لَنَا مِنَ الْأَمْرِ‌ شَيْءٌ مَّا قُتِلْنَا هَاهُنَا :"If we had any say in the matter, we would have not been killed here." Since there were chances that sincere Muslims may be affected by such doubt-creating devices used by hypocrites, Muslims were asked through these verses to remain unconcerned with such sayings and doings and adhere to the belief that the span of life and the time of death are ordained by Allah alone.