It is reported that Bashr b. Al-Hârith said, “I was once with Al-Fudayl b. ‘Ayyâd in Makkah. He sat with us until midnight, then went and did tawâf until the morning. I said, ‘Abû ‘Alî! Won’t you sleep?’ He replied, ‘Woe to you! And is there anyone who hears a mention of the Fire and then feels like sleeping!?’”
Abû Bakr Al-Daynûrî, Al-Mujâlasah wa Jawâhir Al-‘Ilm, article 723.