'Umar said: We were with the Messenger of Allah ﷺ on a journey and a man said: No, by my father. Another man said: “Do not swear by your fathers.` I turned and saw that it was the Messenger of Allah ﷺ.
Narrated Ubaidullah bin ‘Abdullah bin 'Utbah bin Mas'ood told us that Abu Hurairah said:
When the Messenger of Allah ﷺ died and Abu Bakr رضي الله عنه became (caliph) after him, and some of the Arabs apostatized,ʻUmar رضي الله عنه said: O Abu Bakr, how can you fight the people when the Messenger of Allah ﷺ said: `I have been ordered to fight the people until they bear witness that there is no god except Allah. Whoever bears witness that there is no god except Allah has protected his wealth and his life from me, except in cases dictated by Islamic law, and their reckoning will be with Allah`? Abu Bakr رضي الله عنه said: by Allah I shall certainly fight the one who separates prayer and zakah, for zakah is what is due from wealth. By Allah, whoever withholds from me a goat that they used to give (in zakah) to the Messenger of Allah ﷺ, I shall fight them for withholding it. 'Umar said: By Allah, as soon as I realized that Allah had opened the heart of Abu Bakr to fighting, I realized that it was the right thing to do.
Narrated It was narrated from Ibn 'Umar that 'Umar bin al-Khattab addressed us in al-Jabiyah, and said:
The Messenger of Allah ﷺ stood before us as I am standing before you, and said: `I urge you to show respect to my Companions, then those who come after them, then those who come after them, then lying will become so widespread that a man will start to give testimony before he is asked to do so.Whoever among you wants to attain a spacious abode in Paradise, let him adhere to the jama'ah (main body of Muslims), for the Shaitan is with the one who is alone, but he is further away from two. And no one of you should be alone with a woman for the Shaitan will be the third one present. The one who is pleased with his good deeds and upset by his bad deeds is a believer.`
