(a) The same hadith is narrated through another chain: Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates something similar from the Prophet (peace and blessings be upon him).
(b) In this hadith there has been disagreement over al-Hasan through many chains, and the chain we have mentioned is, if Allah wills, the most authentic of them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4001