John 5:6

6.Wilt thou be made whole? He does not inquire about it, as if it were a doubtful matter, but partly in order to kindle in the man a desire of the favor which was offered to him, and partly to quicken the attention of the witnesses who were present, and who, if they had been thinking of something else, might not have perceived the miracle, as frequently happens in sudden occurrences. For these two reasons, therefore, this preparation was necessary.