The Bible does not say that this angel Lucifer is the same being as Satan. In translations of the Bible, such as the King James Version, this angel’s name is said to be Lucifer. As punishment for his wickedness, the angel was cast out of Heaven and into the dark pit of the Earth so that he would be even lower than humanity.
According to the Bible, this angel became so vain and proud that he thought himself above God. In the Bible, the story of a fallen angel is mentioned in Ezekiel 28 and Isaiah 14. As with Iblis in Islamic scripture, the name Lucifer is often a source of debate among Biblical scholars.