Mishkat al-Masabih 5 Funerals كتاب الجنائز 174

وَعَنِ ابْنِ عَبَّاسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «اللَّحْدُ لَنَا وَالشَّقُّ لغيرنا» رَوَاهُ التِّرْمِذِيّ وَأَبُو دَاوُد وَابْن مَاجَه وَرَوَاهُ أَحْمَدُ عَنْ جَرِيرِ بْنِ عَبْدِ اللَّهِ

Ibn ‘Abbas reported God’s messenger as saying, “The niche in the side of the grave is for us and the excavation in the middle is for others.” Tirmidhi, Abu Dawud, Nasa’i and Ibn Majah transmitted it, and Ahmad transmitted it from Jarir b. ‘Abdallah.