His saying: "Ta-Sin-Mim." Al-Hasan said: "I do not know its interpretation, except that a group of the Salaf (predecessors) used to say regarding it: They are names of the surahs and their opening letters."
قَوْله: ﴿طسم﴾ قَالَ الْحَسَنُ: لَا أَدْرِي مَا تَفْسِيرُهَا، غَيْرَ أَنَّ قَوْمًا مِنَ السَّلَفِ كَانُوا يَقُولُونَ فِيهَا: أَسْمَاءُ السُّور وفواتحها
