John 5:4

For an angel went down at a certain season into the pool, and troubled the water: whosoever then first after the troubling of the water stepped in was made whole of whatsoever disease he had.

Ver. 4. For an angel went down] The miracle of this pool was granted to the Jews, partly to strengthen them in the true worship of God under the persecution of Antiochus, in the cessation of prophecy; partly to retain them in their religious course of sacrificing to the true God, against the scoffs of the Romans (that were now their lords). Such a virtue being given to that water, wherein their sacrifices were wont to be washed. See a more sovereign bath than this,Zechariah 13:1; an ever-flowing and over-flowing fountain, not for one at once, as here, but for all that come, they may wash and be clean, wash and be whole.

At a certain season] Once a year only, Semel quotannis, saith Tertullian. Others (more probably) at all their great feasts, when the people met out of all parts at Jerusalem, taking κατα distributively, asMatthew 27:15 .

Troubled the water] Not in a visible shape, likely; but as it appeared by a visible troubling of the waters and a miraculous healing of the diseased. But that troubled waters should do cures was the greater wonder: since holy wells (as they call them) and waters that heal are commonly most calm and clear. It was a witty allusion hereunto of him that said, Angels trouble the clear stream of justice at certain times.