Parallel
Exodus 17:12
Clementine Vulgate · Berean Standard Bible
Manus autem Moysi erant graves : sumentes igitur lapidem, posuerunt subter eum, in quo sedit : Aaron autem et Hur sustentabant manus ejus ex utraque parte. Et factum est ut manus illius non lassarentur usque ad occasum solis.
When Moses’ hands grew heavy, they took a stone and put it under him, and he sat on it. Then Aaron and Hur held his hands up, one on each side, so that his hands remained steady until the sun went down.