Hadith 349
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings be upon him): "Indeed, every deed has a period of enthusiasm, and every enthusiasm has a period of slackening. When the doer remains upright and adopts moderation, then have hope for him; but if he is pointed at with a finger (i.e., becomes notorious), then do not count him among any number."