Abdullah bin Wahb narrated the hadith to them from Amr (bin al-Harith); he narrated it with the same chain and added that Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) asked Sayyiduna Umar (may Allah be pleased with him) about it, and he said: Yes! When Sa'd (may Allah be pleased with him) narrates something to you from the Prophet (peace and blessings be upon him), do not ask anyone else about it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1275