You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Martin_Luther

Context:
The negotiations were successfully concluded on 17 February 1546. After 8 a.m., he experienced chest pains. When he went to his bed, he prayed, "Into your hand I commit my spirit; you have redeemed me, O Lord, faithful God" (Ps. 31:5), the common prayer of the dying. At 1 a.m. he awoke with more chest pain and was warmed with hot towels. He thanked God for revealing his Son to him in whom he had believed. His companions, Justus Jonas and Michael Coelius, shouted loudly, "Reverend father, are you ready to die trusting in your Lord Jesus Christ and to confess the doctrine which you have taught in his name?" A distinct "Yes" was Luther's reply.

Question:
When did Luther waken with more chest pains?

1 a.m