“The angels asked, "O God! Is there anything of Your creation stronger than rocks?" God said, "Yes; iron is stronger than rocks, for it breaks them." The angels said, "O Lord! Is there anything of Your creation stornger than iron?" God said, "Yes; fire is stronger than iron, for itmelts it." And the angels said, O defender! Is there anything of Your creation stronger than fire?" God said, "Yes; water overcomes fire; it kills it and makes it cold." Then the angels said, "O Lord! Is there anything of Your creation stronger than water?" God said, "Yes; wind overcomes water: it agitates it and puts it in motion." They said, "O our cherisher! Is there anything in Your creation stronger than wind?" God said, "Yes, the children of Adam, giving alms; that is, those who give with their right hands and conceal if from their left, they overcome all." Tirmizi, Tafsir, Muavvizatayn 2,