Mishkat al-Masabih
Abu Rafi‘ said that God's messenger lowered Sa‘d and sprinkled water over his grave. Ibn Majah transmitted it.
وَعَنْ أَبِي رَافِعٍ قَالَ: سَلَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سَعْدًا وَرَشَّ عَلَى قَبره مَاء. رَوَاهُ ابْن مَاجَه
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