And there came an angel of the LORD, and sat under an oak which was in Ophrah, that pertained unto Joash the Abiezrite: and his son Gideon threshed wheat by the winepress, to hide it from the Midianites. There came an angel of the Lord - The prophet came to teach and exhort, the angel comes to confirm the word of the prophet, to call and commission him who was intended to be their deliverer, and to work miracles, in order to inspire him with supernatural courage and a confidence of success.
Ophrah - Or Ephra, was a city, or village rather, in the half tribe of Manasseh, beyond Jordan.
His son Gideon threshed wheat - This is not the only instance in which a man taken from agricultural employments was made general of an army, and the deliverer of his country. Shamgar was evidently a ploughman, and with his ox-goad he slew many Philistines, and became one of the deliverers of Israel. Cincinnatus was taken from the plough, and was made dictator and commander-in-chief of the Roman armies. There is a great similarity between his case and that of Gideon.
Threshed wheat by the winepress - This was a place of privacy; he could not make a threshing-floor in open day as the custom was, and bring either the wheel over the grain, or tread it out with the feet of the oxen, for fear of the Midianites, who were accustomed to come and take it away as soon as threshed. He got a few sheaves from the field, and brought them home to have them privately threshed for the support of the family. As there could be no vintage among the Israelites in their present distressed circumstances, the winepress would never be suspected by the Midianites to be the place of threshing corn.