Charles H. Spurgeon on Psalms 108:11

Wilt not thou, O God? His hand shall lead him even to Petra, which seems unapproachable by human strength. That marvellous rock city of the Edomites is surrounded by rocks some of which are three hundred feet high, and a single path twelve in width leads to it. The city itself is partly hewn out of the cloven rocks, and its ruins, which however belong to a later period, fill travellers with amazement. —Augustus F. Tholuck.