Silsilat al-Ahadith al-Sahihah

Sayyiduna Jabir bin Samurah (may Allah be pleased with him) says: Sayyiduna Umar bin Khattab (may Allah be pleased with him) addressed us at the place of Jabiyah and said: The Messenger of Allah (peace and blessings of Allah be upon him) stood among us as I am standing among you and said: "Take care regarding my companions, then those who come after them, and then those who come after them. After that, lying will become widespread, to the extent that a man will give testimony though it was not requested from him, and he will swear an oath though it was not requested from him."