He sent messengers throughout all Manasseh; and they also were gathered together after him: and he sent messengers to Asher, and to Zebulun, and to Naphtali; and they came up to meet them.
So here was Gideon hiding from the Midianites as he was threshing the wheat because if the Midianites had caught him they'd take the wheat. And so he was out by the winepress threshing wheat and here was an angel sitting under an oak tree.