In the further expansion of this command, Moses first of all fixes the place where the stones were to be set up, namely, upon Mount Ebal (see at Deuteronomy 11:29), - not upon Gerizim, according to the reading of the Samaritan Pentateuch; for since the discussion of the question by Verschuir (dissertt. phil. exeg. diss. 3) and Gesenius (de Pent. Samar. p. 61), it may be regarded as an established fact, that this reading is an arbitrary alteration. The following clause, "thou shalt plaister," etc., is a repetition in the earliest form of historical writing among the Hebrews. To this there are appended in Deuteronomy 27:5-7 the new and further instructions, that an altar was to be built upon Ebal, and burnt-offerings and slain-offerings to be sacrificed upon it. The notion that this altar was to be built of the stones with the law written upon them, or even with a portion of them, needs no refutation, as it has not the slightest support in the words of the text. For according to these the altar was to be built of unhewn stones (therefore not of the stones covered with cement), in obedience to the law in Exodus 20:22 (see the exposition of this passage, where the reason for this is discussed). The spot selected for the setting up of the stones with the law written upon it, as well as for the altar and the offering of sacrifice, was Ebal, the mountain upon which the curses were to be proclaimed; not Gerizim, which was appointed for the publication of the blessings, for the very same reason for which only the curses to be proclaimed are given in Deuteronomy 27:14. and not the blessings, - not, as Schultz supposes, because the law in connection with the curse speaks more forcibly to sinful man than in connection with the blessing, or because the curse, which manifests itself on every hand in human life, sounds more credible than the promise; but, as the Berleburger Bible expresses it, "to show how the law and economy of the Old Testament would denounce the curse which rests upon the whole human race because of sin, to awaken a desire for the Messiah, who was to take away the curse and bring the true blessing instead." For however remote the allusion to the Messiah may be here, the truth is unquestionably pointed out in these instructions, that the law primarily and chiefly brings a curse upon man because of the sinfulness of his nature, as Moses himself announces to the people in Deuteronomy 31:16-17. And for this very reason the book of the law was to be laid by the side of the ark of the covenant as a "testimony against Israel" (Deuteronomy 31:26). But the altar was built for the offering of sacrifices, to mould and consecrate the setting up of the law upon the stones into a renewal of the covenant. In the burnt-offerings Israel gave itself up to the Lord with all its life and labour, and in the sacrificial meal it entered into the enjoyment of the blessings of divine grace, to taste of the blessedness of vital communion with its God. By connecting the sacrificial ceremony with the setting up of the law, Israel gave a practical testimony to the fact that its life and blessedness were founded upon its observance of the law. The sacrifices and the sacrificial meal have the same signification here as at the conclusion of the covenant at Sinai (Exodus 24:11). - In Deuteronomy 27:8 the writing of the law upon the stones is commanded once more, and the further injunction is added, "very plainly." - The writing of the law is mentioned last, as being the most important, and not because it was to take place after the sacrificial ceremony. The different instructions are arranged according to their character, and not in chronological order.

Deuteronomy 27:13 Parallel Commentaries

mount Ebal

Deuteronomy 27:4 Therefore it shall be when you be gone over Jordan, that you shall set up these stones, which I command you this day, in mount Ebal...

Deuteronomy 11:29 And it shall come to pass, when the LORD your God has brought you in to the land where you go to possess it...

Joshua 8:33 And all Israel, and their elders, and officers, and their judges...

to curse [heb] for a cursing
Reuben

Genesis 29:32 And Leah conceived, and bore a son, and she called his name Reuben: for she said, Surely the LORD has looked on my affliction...

Genesis 30:6-13,20 And Rachel said, God has judged me, and has also heard my voice, and has given me a son: therefore called she his name Dan...

Genesis 49:3,4 Reuben, you are my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power...