John Gill
INTRODUCTION TO Joshua 4 This chapter relates an order, that is men, should take twelve stones out of the midst of Jordan, and carry them to the first place they lodged at as a memorial of their passage over it, Joshua 4:1; and how Joshua set up twelve other stones in the river itself, Joshua 4:9; and how many of the tribes of Reuben, Gad, and Manasseh, went before the Israelites when they passed...
John Gill
Then ye shall answer them,.... By informing them of the design and use of them: that the waters of Jordan were cut off before the ark of the covenant of the Lord when it passed over Jordan; the waters below from those that were, above, which stood up on an heap; so that they were divided and separated from each other, and made dry land for a passage of the children of Israel; and this was done...
Matthew Henry
This chapter gives a further account of the miraculous passage of Israel through Jordan. I. The provision that was made at that time to preserve the memorial of it, by twelve stones set up in Jordan (ver. 9) and other twelve stones taken up out of Jordan, ver. 1-8. II. The march of the people through Jordan's channel, the two tribes first, then all the people, and the priests that bore the ark...