Shu'ayb bin al-Layth bin Sa'd (may Allah have mercy on him) said that al-Layth (may Allah have mercy on him) narrated it to us, and narrated this hadith with the same chain from the Prophet (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6870