And when they came unto the threshing-floor of Chidon (or Nachon), in all likelihood the usual floor in the open, a shelter overhead being provided in some cases, Uzza put forth his hand to hold the ark; for the oxen stumbled. Cf 2 Samuel 6:6-11.
Related Commentaries of 1 Chronicles 13:9
1 Chronicles 13:9
9 And when they came unto the threshingfloor of Chidon,d Uzza put forth his hand to hold the ark; for the oxen stumbled.