It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that the Messenger of Allah (peace and blessings be upon him) said: "Seek provision in the hidden treasures of the earth."
No one narrated this hadith from Hisham bin Urwah (may Allah have mercy on him) except Hisham bin Abdullah (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الألف / 895
Hadith Takhrij«أخرجه أبو يعلى فى «مسنده» برقم: 4384، وابن حجر فى «المطالب العالية» برقم: 1361، والطبراني فى «الأوسط» برقم: 8097»