It is narrated from Sayyiduna Ibn Amr (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) saw some people arguing with each other, so he said: "The previous nations were destroyed for this very reason that they struck one part of their books against another. The Qur'an was not revealed in such a way that one part of it would belie another; rather, it confirms each other. Therefore, act upon whatever knowledge you have, and as for what you do not know, ask those who have knowledge about it."