Ibn Kathir reported: Al-Shafi’i, may Allah have mercy on him, said, “If the people were to reflect upon Surat al-‘Asr, it would be enough for them.”
Source: Tafsīr Ibn Kathīr 103:1
عن ابن كثير وَقَالَ الشَّافِعِيُّ رَحِمَهُ اللَّهُ لَوْ تَدَبَّرَ النَّاسُ هَذِهِ السُّورَةَ لَوَسِعَتْهُمْ
103:1 تفسير القرآن العظيم تفسير سورة العصر