It is narrated on the authority of 'Abdullah son of 'Umar that the Messenger of Allah (صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ) said: (The superstructure of) al-Islam is raised on five (pillars), testifying (the fact) that there is no god but Allah, that Muhammad is His bondsman and messenger, and the establishment of prayer, payment of Zakat, Pilgrimage to the House (Ka'ba) and the fast of Ramadan.

It is narrated on the authority of Ibn 'Umar ('Abdullah bin 'Umar) that the Messenger of Allah (ﷺ) observed: Verily Islam started as something strange and it would again revert (to its old position) of being strange just as it started, and it would recede between the two mosques just as the serpent crawls back into its hole.

Abu Hurairah (RA) reported Allah's Messenger (ﷺ) as saying: A Muslim who emancipates a Muslim (slave), Allah will save from Fire every limb of his for every limb (of the slave). Sa'id bin Marjana said: When I heard this hadith from Abu Hurairah (RA) , I went away and made a mention of it to 'Ali bin Husain and he at once emancipated the slave for which Ibn ja'far was prepared to pay ten thousand dirhams or one thousand dinars.

It has been narrated on the authority of 'Abdullah that the Messenger of Allah (ﷺ) said: The Caliphate will remain among the Quraish even if only two persons are left (on the earth),

It has been reported on the authority of Nafi, that 'Abdullah bin 'Umar (RA) paid a visit to'Abdullah bin Muti' in the days (when atrocities were perpetrated on the People Of Madinah) at Harra in the time of Yazid bin Mu'awiyah. Ibn Muti' said: Place a pillow for Abu 'Abdul Rahman (family name of 'Abdullah bin 'Umar). But the latter said: I have not come to sit with you. I have come to you to tell you a tradition I heard from the Messenger of Allah (ﷺ) . I heard him say: One who withdraws his band from obedience (to the Amir) will find no argument (in his defence) when he stands before Allah on the Day of Judgment, and one who dies without having bound himself by an oath of allegiance (to an Amir) will die the death of one belonging to the days of Jahillyya.