Nissan Mindel: Eldad the Danite went on to relate that the four tribes, Dan; Naftali, Gad and Asher, did communicate with the Sons of Moses by means of a pigeon. If they wanted to ask them about a law or a tradition, they used to write the question on a piece of parchment, and tie it on the leg of the pigeon, which carried it across the river. In the same way they received the reply.
WIKIPEDIA: According to the Bible, Galilee was named by the Israelites and was the tribal region of Naphthali and Dan, at times overlapping the Tribe of Asher's land.
