John 5:4 - Wesley's Explanatory Notes

An angel — Yet many undoubtedly thought the whole thing to be purely natural. At certain times — Perhaps at a certain hour of the day, during this paschal week, went down — The Greek word implies that he had ceased going down, before the time of St. John's writing this. God might design this to raise expectation of the acceptable time approaching, to add a greater lustre to his Son's miracles, and to show that his ancient people were not entirely forgotten of him. The first — Whereas the Son of God healed every day not one only, but whole multitudes that resorted to him.