John Gill's Bible Commentary Ver. 7. And the Lord said unto Joshua , etc.] Out of the tabernacle: this day will I begin to magnify thee in the sight of all Israel ; by working the miracle afterwards related; dividing the waters, which was done on this day, and was but the beginning of wonders; for other great and marvellous things were done for him and by him, by which it appeared he was high in the favour of God, greatly esteemed and honoured by him, and so would be great and honourable in the account of the people: that they may know that as I was with Moses, [so] I will be with thee ; by dividing the waters of Jordan for him, as he had divided the waters of the Red sea for Moses; which, as it was a token of his powerful presence with him, this would be a like token of it with Joshua. The Targum is, “as my Word was for the help of Moses, so shall my Word be for thy help.”
Matthew Henry Commentary
Verses 7-13 - The waters of Jordan shall be cut off. This must be done in such a wa as never was done, but in the dividing of the Red sea. That miracle i here repeated; God has the same power to finish the salvation of his people, as to begin it; the WORD of the Lord was as truly with Joshu as with Moses. God's appearances for his people ought to encourag faith and hope. God's work is perfect, he will keep his people Jordan's flood cannot keep out Israel, Canaan's force cannot turn the out again.
Original Hebrew ויאמר559 יהוה3068 אל413 יהושׁע3091 היום3117 הזה2088 אחל2490 גדלך1431 בעיני5869 כל3605 ישׂראל3478 אשׁר834 ידעון3045 כי3588 כאשׁר834 הייתי1961 עם5973 משׁה4872 אהיה1961 עמך׃5973