Joshua 18:19

18:19 It then crossed to the slope of Beth Hoglah to the north and ended at the northern tip of the Salt Sea at the mouth of the Jordan River. This was the southern border.

Joshua 3:16

3:16 the water coming downstream toward them stopped flowing. It piled up far upstream at Adam (the city near Zarethan); there was no water at all flowing to the sea of the Arabah (the Salt Sea). The people crossed the river opposite Jericho.