Sunan Ibn Majah, Hadith 3826 ⓘ
It was narrated that Hazim bin Harmalah said: "I passed by the Prophet (saas) and he said to me: 'O Hazim, say often: "La hawla wa la quwwata illa billah (there is no power and no strength except with Allah)," for it is one of the treasures of Paradise.'"
حَدَّثَنَا يَعْقُوبُ بْنُ حُمَيْدٍ الْمَدَنِيُّ، حَدَّثَنَا مُحَمَّدُ بْنُ مَعْنٍ، حَدَّثَنَا خَالِدُ بْنُ سَعِيدٍ، عَنْ أَبِي زَيْنَبَ، مَوْلَى حَازِمِ بْنِ حَرْمَلَةَ عَنْ حَازِمِ بْنِ حَرْمَلَةَ، قَالَ مَرَرْتُ بِالنَّبِيِّ ـ صلى الله عليه وسلم ـ فَقَالَ لِي " يَا حَازِمُ أَكْثِرْ مِنْ قَوْلِ لاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ فَإِنَّهَا مِنْ كُنُوزِ الْجَنَّةِ " .
also referenced under: Book 33, Hadith 171 (In-Book) & Volume 5, Book 33, Hadith 3826 (DarusSalam)