Hadith 28-28

حَدَّثَنا أَبي رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَنا سَعْدِ بْنِ عَبْدِ اللَّه، عَن يَعْقُوبِ بْنِ يَزِيد، عَن إِسْمَاعِيل بْنِ مُوسَى، عَن أَخِيهِ عَلِىِّ بْنِ مُوسَى الرِّضا عَلَيْهِ السَّلامُ، عَن أَبيهِ، عَن جَدِّهِ قالَ سُئِلَ عَلِيُّ بْنُ الْحُسَيْنِ‏ عَلَيْهِ السَّلامُ مَا بَالُ الْمُتَهَجِّدِينَ بِاللَّيْلِ مِنْ أَحْسَنِ النَّاسِ وَجْهاً قَالَ لانَّهُمْ خَلُّوا بِرَبِّهِمْ فَكَسَاهُمُ اللَّهُ مِنْ نُورِهِ.

(The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Yaqoob ibn Yazid, on the authority of Isma’il ibn Musa (a.s.), on the authority of his brother Ali ibn Musa Al-Ridha’ (a.s.), on the authority of his father (a.s.), on the authority of his grandfather (Imam As-Sajjad) (a.s.), “Someone asked Imam As-Sajjad, ‘Why are the people who say night prayers the most pleasant-looking people?’ Imam As-Sajjad (a.s.) replied, “It is because they have had private times at night with God and God has enveloped them in His Own Light.’”