II. The service of God being thus made their deliberate choice, Joshua binds them to it by a solemn covenant, v. 25. Moses had twice publicly ratified this covenant between God and Israel, at Mount Sinai (Exod. xxiv.) and in the plains of Moab, Deut. xxix. 1. Joshua had likewise done it once (ch. viii. 31, &c.) and now the second time. It is here called a statute and an ordinance, because of the strength and perpetuity of its obligation, and because even this covenant bound them to no more than what they were antecedently bound to by the divine command. Now, to give it the formalities of a covenant, 1. He calls witnesses, no other than themselves (v. 22): You are witnesses that you have chosen the Lord. He promises himself that they would never forget the solemnities of this day; but, if hereafter they should break this covenant, he assures them that the professions and promises they had now made would certainly rise up in judgment against them and condemn them; and they agreed to it: "We are witnesses; let us be judged out of our own mouths if ever we be false to our God." 2. He put it in writing, and inserted it, as we find it here, in the sacred canon: He wrote it in the book of the law (v. 26), in that original which was laid up in the side of the ark, and thence, probably, it was transcribed into the several copies which the princes had for the use of each tribe. There it was written, that their obligation to religion by the divine precept, and that by their own promise, might remain on record together. 3. He erected a memorandum of it, for the benefit of those who perhaps were not conversant with writings, v. 26, 27. He set up a great stone under an oak, as a monument of this covenant, and perhaps wrote an inscription upon it (by which stones are made to speak) signifying the intention of it. When he says, It hath heard what was past, he tacitly upbraids the people with the hardness of their hearts, as if this stone had heard to as good purpose as some of them; and, if they should forget what was no done, this stone would so far preserve the remembrance of it as to reproach them for their stupidity and carelessness, and be a witness against them.