The Messenger of Allah (PBUH) sent me as a governor to Yemen and (at the time of departure) he instructed me thus: "You will go to people of the Scripture (i.e., the Jews and the Christians). First of all invite them to testify that La ilaha ill Allah (There is no true god except Allah) and that Muhammad (PBUH) is His slave and Messenger; and if they accept this, then tell them that Allah has enjoined upon them five Salat (prayers) during the day and night; and if they accept it, then tell them that Allah has made the payment of Zakat obligatory upon them. It should be collected from their rich and distributed among their poor; and if they agree to it, don't take (as a share of Zakat) the best of their properties. Beware of the supplications of the oppressed, for there is no barrier between it and Allah."

[Al-Bukhari and Muslim].

Tariq said, "We were sitting with 'Abdullah when his doorkeeper came and said, 'The iqama for the prayer has been given.' He got up and we got up as well and went to the mosque. He saw the people doing ruku' at the front of the mosque. He said the takbir, bowed, and we went and did the same thing that he had done. Then a man rushed past and said, 'Peace be upon you, Abu 'Abdu'r-Rahman.' He said, 'Allah has spoken the truth and His Messenger conveyed the Message.' When we finished the prayer, he returned and went back to is people. We remained sitting in our places, waiting for him until he came out. We said to each other, 'Which of us will ask him?' Tariq said, 'I will ask him,' and he did so. 'Abdullah said, 'From the Prophet, may Allah bless him and grant him peace, who said, "Before the Final Hour people will single out one individual for the greeting, commerce will increase until a woman helps her husband in business, people will sever their links with their relatives, knowledge will spread, false testimony will appear and true testimony will be concealed."'"