Not graded
Bulugh al-Maram 178b
وَزَادَ أَحْمَدُ فِي آخِرِهِ قِصَّةَ قَوْلِ بِلَالٍ فِي آذَانِ اَلْفَجْرِ: { اَلصَّلَاةُ خَيْرٌ مِنَ اَلنَّوْمِ } 1 .
1 - انظر ما قبله.
Ahmad added to the end of the above Hadith, the story of BIlal's statement in the Fajr Adhan (morning prayer call):
as-Salatu khairun minan-nawm - "Prayer is better than sleep".
Cited in Bulugh al-Maram (No. 178b).