A phrase from the treasure of Jannah

The Prophet ﷺ took a mountain pass, or he said, a path between two hills. He said: When a man climbed up on it, he called out, raising his voice: “There is no god but Allah, and Allah is the Greatest.” He said: The Messenger of Allah ﷺ was on his mule, and he said: “You are not calling upon one who is deaf or absent.” Then he said: “O Abu Musa, or O Abdullah, shall I not guide you to a phrase from the treasure of Jannah?” I said, “Yes.” He said:

lā ḥawla wa-lā quwwata illā bi-Allāh

(There is no power and no strength except through Allah)

أَخَذَ النَّبِيُّ ﷺ فِي عَقَبَةٍ، أَوْ قَالَ: فِي ثَنِيَّةٍ. قَالَ: فَلَمَّا عَلاَ عَلَيْهَا رَجُلٌ نَادَى، فَرَفَعَ صَوْتَهُ: لاَ إِلَهَ إِلاَّ اللَّهُ وَاللَّهُ أَكْبَرُ. قَالَ: وَرَسُولُ اللَّهِ ﷺ عَلَى بَغْلَتِهِ، قَالَ: «فَإِنَّكُمْ لاَ تَدْعُونَ أَصَمَّ وَلاَ غَائِبًا»، ثُمَّ قَالَ: «يَا أَبَا مُوسَى، أَوْ يَا عَبْدَ اللَّهِ، أَلاَ أَدُلُّكَ عَلَى كَلِمَةٍ مِنْ كَنْزِ الْجَنَّةِ؟» قُلْتُ: بَلَى. قَالَ:

«لاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ».