Hebrews 11:30

Verse 30. By faith the walls of Jericho fell down, etc. Jos 6:12-20. That is, it was not by any natural causes, or by any means that were in themselves adapted to secure such a result. It was not because they fell of themselves; nor because they were assailed by the hosts of the Israelites; nor was it because there was any natural tendency in the blowing of horns to cause them to fall. None of these things were true; and it was only by confidence in God that means so little adapted to such a purpose could have been employed at all; and it was only by continued faith in him that they could have been persevered in day by day, when no impression whatever was made.