It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that we were with the Messenger of Allah (peace and blessings be upon him) on a journey when a Bedouin came. When he approached the Prophet (peace and blessings be upon him), he said: "Where are you intending to go?" He replied: "I intend to go to my family." The Prophet (peace and blessings be upon him) said: "Do you desire goodness?" He asked: "What is that?" The Prophet (peace and blessings be upon him) said: "(It is) that you bear witness that there is no god but Allah, He is alone, He has no partner, and Muhammad (peace and blessings be upon him) is His servant and Messenger and Prophet." He said: "Who will bear witness to what you say?" The Prophet (peace and blessings be upon him) said: "This thorny tree (bush) (will bear witness to it)." So the Messenger of Allah (peace and blessings be upon him) called it, and although it was at the edge of the valley, it tore through the earth and came and stood before the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) asked it to bear witness, and the tree bore witness three times that you are indeed as you have claimed. Then it returned to its place, and the Bedouin went back to his tribe saying that if they accepted what I say, I will bring them to you, otherwise I will return myself and stay with you.