Hadith 1540
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings be upon him): "If I did not fear hardship for my Ummah, I would have ordered them to use the miswak with every ablution, and to delay the 'Isha prayer until one-third of the night (the narrator is in doubt, perhaps the words are) until half of the night."