What did Martin Luther ask for when he was first brought to trial?

Martin Luther was in quite a lot of trouble with the Catholic Church after he made public his Ninety-Five Theses, which criticized a number of practices and beliefs which had become commonplace in Roman Catholicism. His books were burned publicly, and so offensive were his criticisms that he was excommunicated in 1521. A few months later, he was brought to trial at the Diet of Worms. There, he was asked to confirm that several books presented were indeed written by him, and whether he would recant the statements he had made. Luther confirmed that the books were indeed his, but requested that he have some additional time to think over the second question, as his very soul was on the line. He was granted permission to think on it and asked to return the next day.