Sayyiduna Abu Hadrad al-Aslami (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) seeking help with a woman's dower. He (peace and blessings be upon him) asked: "How much dower have you fixed?" He said: "Two hundred dirhams." He (peace and blessings be upon him) said: "Even if you were scooping (wealth) out of the valley of Buthan, you would not set a higher dower."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14355