Sahih Muslim Book - 48, Hadith - 6864

حَدَّثَنَا أَبُو كَامِلٍ فُضَيْلُ بْنُ حُسَيْنٍ حَدَّثَنَا يَزِيدُ يَعْنِي ابْنَ زُرَيْعٍ حَدَّثَنَا التَّيْمِيُّ عَنْ أَبِي عُثْمَانَ عَنْ أَبِي مُوسَى أَنَّهُمْ كَانُوا مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهُمْ يَصْعَدُونَ فِي ثَنِيَّةٍ قَالَ فَجَعَلَ رَجُلٌ كُلَّمَا عَلَا ثَنِيَّةً نَادَى لَا إِلَهَ إِلَّا اللَّهُ وَاللَّهُ أَكْبَرُ قَالَ فَقَالَ نَبِيُّ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّكُمْ لَا تُنَادُونَ أَصَمَّ وَلَا غَائِبًا قَالَ فَقَالَ يَا أَبَا مُوسَى أَوْ يَا عَبْدَ اللَّهِ بْنَ قَيْسٍ أَلَا أَدُلُّكَ عَلَى كَلِمَةٍ مِنْ كَنْزِ الْجَنَّةِ قُلْتُ مَا هِيَ يَا رَسُولَ اللَّهِ قَالَ لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ.

It was narrated from Abu Musa that they were with the Messenger of Allah (s.a.w). climbing up a hill, and one man, every time he climbed a hill, called out: "La ilaha illallahu, wallahu akbar (None has the right to be worshiped but Allah, and Allah is most great)." The Prophet of Allah (s.a.w) said: "You are not calling upon one who is deaf or absent." And he said: "O Abu Musa, "or" O 'Abdullah bin Qais, shall I not tell you of a word that is one of the treasures of Paradise?" I said: "What is it, O Messenger of Allah?" He said: "La hawla wa la quwwata ilia billah (There is no power and no strength except with Allah)."