Abu Hurairah Abdur-Rahman bin Sakhr (may Allah be pleased with him) narrated, `I heard the Messenger of Allah (peace be upon him) saying, `Avoid that which I forbid you to do and do that which I command you to do to the best of your capacity. Verily, the people before you perished because of their excessive questioning and disagreeing with their prophets. `` (Recorded by Al-Bukhary and Muslim)