John Calvin on Joshua 8:29

29. And the king of Ai he hanged, etc Though he seems to have treated the king with great severity in order to satisfy the hatred of the people, I cannot doubt that he studied faithfully to execute the divine judgment. Conquerors, indeed, are wont to spare captive kings, because their rank seems to carry something venerable along with it, but the condition of kings was different among those nations in which God wished particularly to show how greatly he detested the wickedness which he had so long tolerated. For while all were doomed to destruction, the divine vengeance justly displayed itself with greater sternness and severity on the leaders, with whom the cause of destruction originated.

We may add, that the ignominious punishment inflicted on the king rendered it still less necessary to deal leniently with the common people, and thus prevented the Israelites from indulging an unseasonable mercy, which might have made them more sluggish or careless in executing the work of universal extermination.

God purposely delivered the king alive into the hand of Joshua, that his punishment might be more marked and thus better adapted for an example. Had he fallen in the conflict promiscuously with others, he would have been exempted from this special mark of infamy; but now even after his death, the divine vengeance pursues his corpse. Nay, after being hung, he is thrown forth at the gate of the city where he had sat on his throne in judgment, and a monument is erected for the purpose of perpetuating his ignominy to posterity. His burial, however, is mentioned to let us know that nothing was done through tumultuous impetuosity, as Joshua carefully observed what Moses had prescribed in the Law, (Deuteronomy 21:23) namely, that those hung on gibbets should be taken down before sunset, as a spectacle of the kind was held in abomination. And, certainly, while it is humane to bury the dead under ground, it is inhumanly cruel to cast them forth to be torn by wild beasts or birds. Therefore, that the people might not be accustomed to barbarity, God allowed criminals to be hung, provided they did not hang unburied for more than one day. And that the people might be more attentive to this duty, which otherwise might readily have been neglected, Moses declares that every one who hangs on a tree is accursed; as if he had said, that the earth is contaminated by that kind of death, if the offensive object be not immediately taken away.

Joshua 8:30-35

30. Then Joshua built an altar unto the LORD God of Israel in mount Ebal,

30. Tunc aedificavit Josue altare Jehovae Deo Israel in monte Ebal,

31. As Moses the servant of the LORD commanded the children of Israel, as it is written in the book of the law of Moses, an altar of whole stones, over which no man has lift up any iron: and they offered thereon burnt offerings unto the LORD, and sacrificed peace offerings.

31. Quemadmodum praeceperat Moses servus Jehovae filiis Israel: sicut scriptum est in libro legis Mosis, altare ex lapidibus integris, super quos non levaverant ferrum: et immolaverunt super illud holocausta Jehovae, et sacrificaverunt hostias prosperitatum.

32. And he wrote there upon the stones a copy of the law of Moses, which he wrote in the presence of the children of Israel.

32. Scripsit quoque ibi in lapidibus repetitam legem Mosis, quam scripsit coram filiis Israel.

33. And all Israel, and their elders, and officers, and their judges, stood on this side the ark and on that side before the priests the Levites, which bare the ark of the covenant of the LORD, as well the stranger, as he that was born among them; half of them over against mount Gerizim, and half of them over against mount Ebal; as Moses the servant of the LORD had commanded before, that they should bless the people of Israel.

33. Universus autem Israel, et seniores ejus, et praefecti, et Judices ejus stabant hinc et inde ad arcam coram sacerdotibus Levitis portantibus arcam foederis Jehovae, tam peregrinus quam indigena: dimidia pars ejus contra montem Garizin, et dimidia pars ejus contra montem Ebal: quemadmodum praeceperat Moses servus Jehovae, ut benediceret populo Israel primum.

34. And afterward he read all the words of the law, the blessings and cursings, according to all that is written in the book of the law.

34. Et post haec legit omnia verba legis, benedictionem et maledictionem, secundum id totum quod scriptum est in libro legis.

35. There was not a word of all that Moses commanded, which Joshua read not before all the congregation of Israel, with the women, and the little ones, and the strangers that were conversant among them.

35. Non fuit quidquam ex omnibus quae praeceperat Moses quod non legerit Josue coram universo coetu Israel, et mulieribus, et parvulis, et peregrinis versantibus in medio ipsorum.