Musnad Ahmad

It is narrated from Hazrat Dhu Makhmar (may Allah be pleased with him) that I heard the Noble Prophet (peace and blessings be upon him) say: Soon the Romans will make a peace treaty of security with you, then you and they will together fight a common enemy. You will be victorious in that battle and will return safe and sound with spoils of war. When you reach a place called "Dhi Tulul," a Christian will raise a cross and say, "The cross has prevailed." At this, a Muslim will become angry and will stand up to respond to him. Right there, a Roman will respond, and from there the Romans will break the treaty and begin preparing for war.

Imam Sha’bi (may Allah have mercy on him) says that I once asked Hazrat Ibn Umar (may Allah be pleased with them both), “Can one camel and one cow suffice for seven people?” He replied, “Sha’bi! Does it have seven lives?” I said, “Other companions (may Allah be pleased with them) say that the Noble Prophet (peace and blessings be upon him) appointed one cow and one camel for seven people.” Upon this, Hazrat Ibn Umar (may Allah be pleased with them both) asked a man, “O so-and-so! Is this the case?” He said, “Yes!” So Hazrat Ibn Umar (may Allah be pleased with them both) said, “I did not know about this.”