“I said to Ubayy bin Ka’b: ‘Your brother Abdullah bin Mas’ud says: “Whoever stands (in voluntary prayer) the whole year, then he will have reached the Night of Al-Qadr.’” So he said: ‘May Allah forgive Abu Abdur-Rahman. He knows that is during the last ten (nights) of Ramadan, and that it is the night of the twenty-seventh. But he wanted the people to not rely upon that.’ Then he uttered an oath, that without exception it is on the night of the twenty-seventh.” He said: “I said to him: ‘Why is it that you say that O Abu Al-Mindhir?’ He said: “By the sign or indication which the Messenger of Allah informed us of: ‘That the sun rises on that day having no beams with it.’”
يَغْفِرُ اللَّهُ لأَبِي عَبْدِ الرَّحْمَنِ لَقَدْ عَلِمَ أَنَّهَا فِي الْعَشَرَةِ الأَوَاخِرِ مِنْ رَمَضَانَ وَأَنَّهَا لَيْلَةُ سَبْعٍ وَعِشْرِينَ وَلَكِنَّهُ أَرَادَ أَنْ لاَ يَتَّكِلَ النَّاسُ ثُمَّ حَلَفَ لاَ يَسْتَثْنِي أَنَّهَا لَيْلَةُ سَبْعٍ وَعِشْرِينَ قُلْتُ لَهُ بِأَىِّ شَيْءٍ تَقُولُ ذَلِكَ يَا أَبَا الْمُنْذِرِ قَالَ بِالآيَةِ الَّتِي أَخْبَرَنَا رَسُولُ اللَّهِ ﷺ أَوْ بِالْعَلاَمَةِ أَنَّ الشَّمْسَ تَطْلُعُ يَوْمَئِذٍ لاَ شُعَاعَ لَهَا