A man came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah (peace and blessings be upon him), which spot (of land) is the best? He (peace and blessings be upon him) said: "I do not know." Then he said: Which spot is the worst? He (peace and blessings be upon him) said: "I do not know." The narrator says: Jibril (peace be upon him) came to him (peace and blessings be upon him), and he (peace and blessings be upon him) asked him: "O Jibril, which spot is the best?" He said: I do not know. Then he (peace and blessings be upon him) asked: "O Jibril, which spot is the worst?" He said: I do not know. He (peace and blessings be upon him) said: "Ask your Lord." The narrator says: Jibril (peace be upon him) shuddered so violently that Muhammad (peace and blessings be upon him) almost fell unconscious, and Jibril said: I do not ask Him about anything. Allah Almighty said to Jibril, the Trustworthy: Muhammad (peace and blessings be upon him) asked you which spot is the best, and you said: I do not know; and he asked you which spot is the worst, and you said: I do not know. So tell him: "The mosques are the best places, and the markets are the worst places."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13332