The Prophet ﷺ said, "When Allah created the earth, it began to sway, so He created the mountains and set them upon it, and it became firm. The angels marvelled at the strength of the mountains and asked, 'Lord, is there anything in Your creation stronger than the mountains?'He said, 'Yes, iron.'They asked, 'Lord, is there anything in Your creation stronger than iron?'He said, 'Yes, fire.'They asked, 'Lord, is there anything in Your creation stronger than fire?'He said, 'Yes, water.'They asked, 'Lord, is there anything in Your creation stronger than water?'He said, 'Yes, the wind.'They asked, 'Lord, is there anything in Your creation stronger than the wind?'He said, 'Yes, the son of Adam who gives charity with his right hand and conceals it from his left.'"
حدثنا محمد بن بشار حدثنا يزيد بن هارون حدثنا العوام بن حوشب عن سليمان بن أبي سليمان
عن النبي ﷺ قال لما خلق الله الأرض جعلت تميد فخلق الجبال فعاد بها عليها فاستقرت فعجبت الملائكة من شدة الجبال قالوا يا رب هل من خلقك شيء أشد من الجبال قال نعم الحديد قالوا يا رب فهل من خلقك شيء أشد من الحديد قال نعم النار فقالوا يا رب فهل من خلقك شيء أشد من النار قال نعم الماء قالوا يا رب فهل من خلقك شيء أشد من الماء قال نعم الريح قالوا يا رب فهل من خلقك شيء أشد من الريح قال نعم ابن آدم تصدق بصدقة بيمينه يخفيها من شماله
[Its chain of transmission is hasan] and Ahmad narrated it, 3/124, from Yazid bin Harun with the same wording, and Diya Maqdisi mentioned it in Al-Mukhtarah, 152/1–154, hadith 2148–2150.Sulayman bin Abu Sulayman was deemed reliable by Ibn Hibban, and Ibn Khuzayma graded his narration sahih, hadith 1223, and he is hasan al-hadith.