Abdullah bin Abdur Rahman Al-Qushayri said: Prophet Dawud (peace be upon him) said: "Tell the seeker of knowledge to make an iron staff and iron shoes, and to continue seeking knowledge until the staff breaks and the shoes wear out."
Hadith Takhrijاس روایت کی سند مظلم و نا قابل اعتبار ہے۔ دیکھئے: [جامع بيان العلم وفضله 577] ، لیکن اس میں اس روایت کو موسیٰ علیہ السلام سے ذکر کیا ہے۔ نیز دیکھئے: [الرحلة للخطيب ص: 86]
Brief Explanation
(Commentary on Hadiths 580 to 584)
In this, there is encouragement to set out and travel in pursuit of knowledge, but this is not a statement of Dawud (alayhis salam); it could be a general admonition from an ordinary Muslim.