The land allotted to Joseph’s descendants extended from the Jordan at Jericho ¹  to the waters of Jericho to the east, through the desert and on up from Jericho into the hill country of Bethel. ² 

Joshua sent men from Jericho ¹  to Ai (which is located near Beth Aven, east of Bethel ² ) and instructed them, “Go up and spy on the land.” So the men went up and spied on Ai.