This is taken from the parable of the Ten Virgins. Jesus said in Matthew 25 that the Kingdom of Heaven was like 10 Virgins, 5 of whom had their lamps trimmed and lit, and 5 of whom did not have enough oil in their lamps. Sleep crept in and at midnight a cry and trumpet call was heard proclaiming the Bridgegroom was here. Five virgins with lit lamps made it into the Kingdom of Heaven and five did not.
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