He did not want his brothers to be in darkness and unprepared. Instead, he urged them as “sons of light ” to ‘ stay awake and keep their senses. ’
لِذٰلِكَ ،‏ حَثَّهُمْ ‹ كَأَبْنَاءِ نُورٍ › أَنْ ‹ يَبْقَوْا مُسْتَيْقِظِينَ وَوَاعِينَ › .‏ ‏