Examples:

• You do not have a prayer.
• With the way that the other team has been playing, I'm afraid our guys don't have a prayer.
• They didn’t have a prayer without a backer for the new company.
• If you say that someone hasn't got a prayer, you mean that it is impossible for them to succeed in what they are trying to do.
• She hasn't a prayer of winning the competition.
• at all this term, so she doesn’t have a prayer of passing her exams.