Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: In the time of the Prophet (peace and blessings be upon him), when a man saw a dream he would relate his dream to the Prophet (peace and blessings be upon him). He says: I too wished to see a dream and relate it to the Prophet (peace and blessings be upon him). I was an unmarried young man and used to sleep in the mosque. I saw that two angels came to me, and one said: "Take him to the Fire." I began saying: "I seek refuge with Allah from Hell." Then another angel met us and said to me: "Do not be alarmed." They took me towards Hell and we stood at its edge. It had two posts like those of a well, and in it I saw men whom I knew. In the morning I related my dream to Sayyidah Hafsah (may Allah be pleased with her), and Sayyidah Hafsah (may Allah be pleased with her) related it to the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) said: "What a good man Abdullah is, if only he would pray at night." Salim (may Allah have mercy on him) says: After that Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) slept very little at night.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4642