Sayyiduna Hudhayfah (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said: "We have been favoured over people with three things: our rows have been made like the rows of the angels; the earth has been made a place of prayer for us and its soil has been made pure; and I have been given these last verses of Surah al-Baqarah from a treasure-house beneath the Throne, which were not given to anyone before me, nor will they be given to anyone after me."
(b) The hadith of Affan has the same meaning as this narration: "Its soil has been made pure for us."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1023