It is narrated from Sayyiduna Abu Ubaidah bin Al-Jarrah (may Allah be pleased with him) that the last words of the Prophet (peace and blessings be upon him) were: "Expel the Jews residing in Hijaz and the people of Najran residing in the Arabian Peninsula, and know that the worst people are those who make the graves of their prophets (peace be upon them) places of prostration."