Doré's engraving of Moses Sustained in Prayer at the Battle of Rephidim is one of the most compositionally inventive plates in his 1866 Bible Illustrations, solving a visual problem that has challenged artists since the medieval period: how to show prayer as action. The solution is spatial. Doré divides the composition vertically: in the lower half, the battle rages in the valley - a confusion of warriors and dust and weaponry; in the upper half, Moses stands on the hilltop with arms raised, Aaron on one side and Hur on the other, their hands supporting his in the posture of intercession. The visual argument is unmistakable: the outcome of the battle below is determined by what happens above.
The biblical text in Exodus 17:10-13 is explicit about the mechanical relationship. When Moses's hands were raised, Israel prevailed; when they dropped from fatigue, Amalek prevailed. The two supporting figures - Aaron and Hur - are not decorative additions but structural necessities: Moses cannot maintain the posture alone, and the battle cannot be won without the posture. Doré captures the communal dimension of this intercession with great care. The three figures on the hilltop form a human tripod, their interdependence visible in the way Aaron and Hur lean in from either side.
For Victorian homiletics, this image was a perfect visual illustration of intercessory prayer as communal, sustained, and effortful. Sermons on 'holding up the hands of Moses' became a standard genre in 19th-century evangelical preaching, applied to missionary support, pastoral work, and congregational prayer meetings. The plate was among the most frequently reproduced in the Doré Bible for devotional purposes, appearing in prayer guides, mission society publications, and Sunday school materials throughout the 1870s and 1880s.
Theologically, the scene raises deep questions about the relationship between divine sovereignty and human intercession that have occupied Christian theology since Augustine. If God had already promised to defeat Amalek (Exodus 17:14), why did the outcome depend on Moses's raised hands? The traditional answer - that God chooses to work through the sustained obedience and prayer of his people as secondary causes - is embodied in Doré's composition. The battle is not won by Moses's arms but through them; they are the conduit, not the source.
Doré's treatment also raises the question of Moses's humanity. This is not the superhuman lawgiver of the Sinai theophany but a man who grows weary, whose arms tire, who needs to be supported by companions. The vulnerability of the mediator is part of the story's theological point: the one through whom God works is fully human, dependent and fallible, sustained by community. This note of mediated dependence was not lost on Reformation-era readers, who saw in Moses's need for support a type of the intercessory work of Christ, who in his humanity bore the weight of the mediatorial office without exhaustion.