When the majority of the people discussed they should know, like the hadith narrated by al-Thaqafi (mentioned above) except for the words:" They (the people) should kindle fire."
حَدَّثَنَا خَالِدٌ الْحَذَّاءُ بِهَذَا الإِسْنَادِ لَمَّا كَثُرَ النَّاسُ ذَكَرُوا أَنْ يُعْلِمُوا بِمِثْلِ حَدِيثِ الثَّقَفِيِّ غَيْرَ أَنَّهُ قَالَ أَنْ يُورُوا نَارًا