8:30-35 As soon as Joshua got to the mountains Ebal and Gerizim, without delay, and without caring for the unsettled state of Israel, or their enemies, he confirmed the covenant of the Lord with his people, as appointed, De 11; 27. We must not think to defer covenanting with God till we are settled in the world; nor must any business put us from minding and pursuing the one thing needful. The way to prosper is to begin with God, Mt 6:33. They built an altar, and offered sacrifice to God, in token of their dedicating themselves to God, as living sacrifices to his honour, in and by a Mediator. By Christ's sacrifice of himself for us, we have peace with God. It is a great mercy to any people to have the law of God in writing, and it is fit that the written law should be in a known tongue, that it may be seen and read of all men.

35. There was not a word of all that Moses commanded, which Joshua read not—It appears that a much larger portion of the law was read on this occasion than the brief summary inscribed on the stones; and this must have been the essence of the law as contained in Deuteronomy (De 4:44; 6:9; 27:8). It was not written on the stones, but on the plaster. The immediate design of this rehearsal was attained by the performance of the act itself. It only related to posterity, in so far as the record of the event would be handed down in the Book of Joshua, or the documents which form the groundwork of it [Hengstenberg]. Thus faithfully did Joshua execute the instructions given by Moses. How awfully solemn must have been the assemblage and the occasion! The eye and the ear of the people being both addressed, it was calculated to leave an indelible impression; and with spirits elevated by their brilliant victories in the land of promise, memory would often revert to the striking scene on mounts Ebal and Gerizim, and in the vale of Sychar.