Narrated Abu Huraira: The Prophet Muhammad (peace be upon him) said, "The worst people in the Sight of Allah on Judgement Day will be the two-faced people who appear to some people with one face and to other people with another face."
Ghiyāth ad-Dīn Abu'l-Fatḥ ʿUmar ibn Ibrāhīm al-Khayyām Nīshāpūrī (18 May 1048 – 4 December 1131; was a Persian polymath: philosopher, mathematician, astronomer and poet. He also wrote treatises on mechanics, geography, mineralogy, music, and Islamic theology.
The Old Testament was penned by thirty-two men, as the Holy Ghost moved upon them. It spans a period of some 3,600 years of mankind's history, and required about 1,500-1,600 years to complete. Its thirty-nine books can be divided into four sections: Law (five-books); History (twelve books); Poetry (five books); and Prophecy (seventeen books, the first five of which are called major prophets, and the last twelve are usually called minor prophets).