Shurahbil says that once I caught a bird in the market that was like a lark. Hazrat Zaid bin Thabit (may Allah be pleased with him) saw it, took it from my hand and set it free (and it flew away), and said: "Do you not know that the Noble Prophet (peace and blessings be upon him) has declared the area between the two boundaries of Madinah Munawwarah as sacred?"