《太平广记·卷八十七·异僧一》
当时汉朝使者蔡愔已经到了他们国家，法兰与摩腾共同决定游化四方，便一块儿跟随汉朝使者来中国，因为他的学生不让他来，他便秘密起程来到中国。
时蔡愔既至彼国，兰与摩腾共契游化，遂相随而来。会彼学徒留碍，兰乃间行而至之。
At that time, the Han envoy Cai Yin had already arrived in their country. Falan and Moteng decided together to move around and convert the masses. They followed the Han envoy to China. However, because his students would not let him leave, he secretly set off to China.