عَن أبي هُرَيْرَة رَفَعَهُ قَالَ:" إِنَّ اللَّهَ عَزَّ وَجَلَّ يَقُولُ: أَنا ثَالِث الشَّرِيكَيْنِ مَا لم يخن صَاحِبَهُ فَإِذَا خَانَهُ خَرَجْتُ مِنْ بَيْنِهِمَا ". رَوَاهُ أَبُو دَاوُد وَزَاد رزين: «وَجَاء الشَّيْطَان»

Jabir said he intended to go to Khaibar, so he went to the Prophet, gave him a salutation and told him of his purpose. He replied, “When you come to my agent take fifteen camel-loads from him, and if he desires a sign from you put your hand on his collar-bone*”. *This was evidently a pre-arranged sign to show that the Messenger was genuine.Abu Dawud transmitted it.