Remember his charge to you, and your promise to him, which they were obliged to keep; and Joshua was to see that they did so. Rest i.e. a place of rest, as that word signifies: See Poole on "Genesis 49:15".
Related Commentaries of Joshua 1:13
Joshua 1:13
13 Remember the word which Moses the servant of the LORD commanded you, saying, The LORD your God hath given you rest, and hath given you this land.