وَعَنْ عَائِشَةَ قَالَتْ: إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا جَلَسَ مَجْلِسًا أَوْ صَلَّى تكلَّم بِكَلِمَاتٍ فَسَأَلْتُهُ عَنِ الْكَلِمَاتِ فَقَالَ:" إِنْ تُكُلِّمَ بِخَيْرٍ كَانَ طَابَعًا عَلَيْهِنَّ إِلَى يَوْمِ الْقِيَامَةِ وَإِنْ تُكُلِّمَ بِشَرٍّ كَانَ كَفَّارَةً لَهُ: سُبْحَانَكَ اللَّهُمَّ وَبِحَمْدِكَ لَا إِلَهَ إِلَّا أَنْتَ أَسْتَغْفِرُكَ وَأَتُوبُ إِلَيْكَ ". رَوَاهُ النَّسَائِيّ

Abu Sa'id al-Khudri said that at the battle of the Trench [The siege of Medina in 5 A. H.] they asked God’s messenger whether there was anything they could repeat, for their hearts were in their mouths.* He replied that there was; they should say, “O God, cover our danger points(1) and give security from fears.” He said that God then sent a wind in the faces of His enemies and God routed them by the wind. *Literally, ‘For the hearts had reached the windpipes.’1. The word is 'aurat used in a similar prayer on p. 510. There it was translated 'faults'. Another meaning refers to places on a frontier, etc., which give openings to an enemy, and so are places where caution is necessary. This seems more suitable in the present context. Cf. Mirqat, iii, 134.Ahmad transmitted it.