Stretch out thy spear Probably a long spear, with a flag or streamer at the top of it, for a signal to the liers in wait, as well as for a sign to his host present to stop their flight, and make head against the pursuers, and as a token of God's presence and assistance with them, and of their victory. The Hebrew word כידון , kidon, however, here rendered spear, also signifies a shield, and is so interpreted in the Vulgate. This, if made of polished brass or steel, might be seen from a great distance, by reason of its brightness.
Related Commentaries of Joshua 8:18
Joshua 8:18
18 And the LORD said unto Joshua, Stretch out the spear that is in thy hand toward Ai; for I will give it into thine hand. And Joshua stretched out the spear that he had in his hand toward the city.