Original Verse:
Joshua Chapter 8 Verse 29And the king of Ai he hanged on a tree until the eventide: and at the going down of the sun Joshua commanded, and they took his body down from the tree, and cast it at the entrance of the gate of the city, and raised thereon a great heap of stones, unto this day.

Reference Verses:
Joshua Chapter 10 Verse 26And afterward Joshua smote them, and put them to death, and hanged them on five trees: and they were hanging upon the trees until the evening.
Joshua Chapter 10 Verse 27And it came to pass at the time of the going down of the sun, that Joshua commanded, and they took them down off the trees, and cast them into the cave wherein they had hidden themselves, and laid great stones on the mouth of the cave, unto this very day.
Deuteronomy Chapter 21 Verse 22-23 [22] And if a man have committed a sin worthy of death, and he be put to death, and thou hang him on a tree; [23] his body shall not remain all night upon the tree, but thou shalt surely bury him the same day; for he that is hanged is accursed of God; that thou defile not thy land which Jehovah thy God giveth thee for an inheritance.
Joshua Chapter 7 Verse 26And they raised over him a great heap of stones, unto this day; and Jehovah turned from the fierceness of his anger. Wherefore the name of that place was called, The valley of Achor, unto this day.
2nd Samuel Chapter 18 Verse 17And they took Absalom, and cast him into the great pit in the forest, and raised over him a very great heap of stones: and all Israel fled every one to his tent.
Deuteronomy Chapter 21 Verse 23his body shall not remain all night upon the tree, but thou shalt surely bury him the same day; for he that is hanged is accursed of God; that thou defile not thy land which Jehovah thy God giveth thee for an inheritance.