The people went up from the Jordan on the tenth day of the first month ¹  and camped in Gilgal on the eastern border of Jericho. ² 

the water coming downstream toward them stopped flowing. ¹  It piled up far upstream ²  at Adam (the city near Zarethan); there was no water at all flowing to the sea of the Arabah (the Salt Sea). ³  The people crossed the river opposite Jericho. ⁴ 

When the men of Ai turned around, they saw ¹  the smoke from the city ascending into the sky and were so shocked they were unable to flee in any direction. ²  In the meantime the men who were retreating to the desert turned against their pursuers.