Abdullah bin Umar ( رضي الله عنه – may Allah be pleased with him) was the son of Umar bin Khattab (another famous companion of Muhammad ﷺ and one of the 4 caliphs of Islam – may Allah be pleased with him). He was also the brother-in-law of Muhammad ﷺ – . He was the second most prolific narrator of ahadith, with a total of 2,630 narrations. He was known for being very particular about following the sunnah – so much so that he would slaughter his sacrifice at the slaughtering place right where the Prophet ﷺ did. He would make his camel sit at Al-Batha’ in Dhul-Hulaifa and offer the prayer because Muhammad ﷺ used to do the same. The Prophet ﷺ used to go to the Mosque of Quba every Saturday (sometimes) walking and (sometimes) riding and Abdullah Ibn Umar used to do the same. Ibn ‘Umar reported that when a person saw anything in sleep, he narrated it to Allah’s Messenger ﷺ, and I also had a longing that I should also see in a dream something which I should narrate to Allah’s Apostle ﷺ and I was at that time an unmarried young man. I was sleeping in the mosque during the lifetime of Allah’s Messenger ﷺ that I saw in a dream as if two angels have taken hold of me and they have carried me to the fire, and, lo, it was built like the easing of a well and had 2 pillars like those of a well; and, lo, there were people in it whom I knew and I cried out: I seek refuge with Allah from Hell-fire; I seek refuge with Allah from Hell-fire. Then another Angel joined the 2 others, and said unto me: “You need not fear.” I narrated this dream to Hafsa (his sister) and she narrated it to Allah’s Messenger ﷺ, whereupon Allah’s Apostle ﷺ said: Worthy is this man Abdullah, If only he would pray at night. Abdullah slept only but for a small part of the night afterwards (meaning, he never left tahajjud after that).