The Hadith, in Islam, is second in authority only to the Qur'an. It is a record of the prophet Mohammed's (pbuh) life, actions, and deeds. A saying in the Hadith is called a sunnah. These sunnah were transmitted by word of mouth down through the centuries having been memorized first by prophet Muhammad's (pbuh) companions and then later by subsequent Muslims. Therefore, the hadith is the written record of the oral traditions passed down from Muslim to Muslim of what the prophet Mohammed (pbuh) was supposed to have said and done.