عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: مَا مِنْ مُسْلِمٍ يَعُودُ مُسْلِمًا غُدْوَةً إِلَّا صَلَّى عَلَيْهِ سَبْعُونَ أَلْفَ مَلَكٍ حَتَّى يُصْبِحَ وَكَانَ لَهُ خَرِيفٌ فِي الْجَنَّةِ ". رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُد

He said that the Prophet used to teach them to say when afflicted by fever or any pain, "In the name of God, the Great, I seek refuge in God, the Mighty, from the evil of every vein that bleeds and from the evil of the heat of hell.” Tirmidhi transmitted it, but said this was a gharib tradition which he knew only among the traditions of Ibrahim b. Isma'il who is declared to be weak in tradition.