Charles H. Spurgeon on Psalms 114:8

Which turned the rock into a standing water, causing a mere or lake to stand at its foot, making the wilderness a pool: so abundant was the supply of water from the rock that it remained like water in a reservoir. The flint into a fountain of waters, which flowed freely in streams, following the tribes in their devious marches. Behold what God can do! It seemed impossible that the flinty rock should become a fountain; but he speaks, and it is done. Not only do mountains move, but rocks yield rivers when the God of Israel wills that it should be so.

"From stone and solid rock he brings

The spreading lake, the gushing springs."

"O magnify the Lord with me, and let us exalt his name together, " for he it is and he alone who doeth such wonders as these. He supplies our temporal needs from sources of the most unlikely kind, and never suffers the stream of his liberality to fail. As for our spiritual necessities they are all met by the water and the blood which gushed of old from the riven rock, Christ Jesus: therefore let us extol the Lord our God. Our deliverance from under the yoke of sin is strikingly typified in the going up of Israel from Egypt, and so also was the victory of our Lord over the powers of death and hell. The Exodus should therefore be earnestly remembered by Christian hearts. Did not Moses on the mount of transfiguration speak to our Lord of "the exodus" which he should shortly accomplish at Jerusalem; and is it not written of the hosts above that they sing the song of Moses the servant of God, and of the Lamb? Do we not ourselves expect another coming of the Lord, when before his face heaven and earth shall flee away and there shall be no more sea? We join then with the singers around the Passover table and make their Hallel ours, for we too have been led out of bondage and guided like a flock through a desert land, wherein the Lord supplies our wants with heavenly manna and water from the Rock of ages. Praise ye the Lord.