It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that once the Noble Prophet (peace and blessings be upon him) sent Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him) to Khaybar so that he could set an estimate for the people living there. Then he gave them the choice to accept it or reject it, but those people said that this is correct and upon this promise the heavens and the earth are established.