Exodus 14:22

And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left.

The children of Israel ... It is highly probable that Moses, along with Aaron, first planted his footsteps on the untrodden sand, encouraging the people to follow him without fear of the treacherous walls; and when we take into account the multitudes that followed him, the immense number who through infancy and old age were incapable of hastening their movements, together with all the appurtenances of the camp, the strong and steadfast character of the leaders' faith was strikingly manifested (Joshua 2:10; Joshua 4:23; Psalms 66:6; Psalms 74:13; Psalms 106:9; Psalms 136:13; Isaiah 63:11; 1 Corinthians 10:1; Hebrews 11:29).