Abdullah bin Umar (may Allah be pleased with him) was the most ascetic and the soundest in opinion

It is narrated from Sayyiduna Ali bin al-Husayn (Imam Zayn al-Abidin) that he said: Sayyiduna Ibn Umar (may Allah be pleased with them both) was the most abstinent (detached from the world) of people and the most correct of them in opinion.

It is narrated from Yusuf bin Mihran that he said: We were with Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both), and he said: If it would please you to see who among the Companions of Muhammad (peace and blessings be upon him) made no change or alteration (in his way), then look at Abdullah bin Umar (may Allah be pleased with them both), for every one of us has changed somewhat (according to circumstances), but he remained as he was.

It is narrated from Abu Ja'far (Imam al-Baqir) that he said: There was none among the Companions of the Prophet (peace and blessings be upon him) who, after hearing a hadith from the Messenger of Allah (peace and blessings be upon him), feared and guarded against adding to it or taking anything away from it as much as Sayyiduna Ibn Umar (may Allah be pleased with them both) did.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he said: I recited this verse: "You will never attain righteousness until you spend from that which you love." [Surah Al Imran: 92] Then I reflected on the blessings which Allah had granted me, and I found nothing dearer to me than my slave girl "Radiyyah". So I said: She is free for the pleasure of Allah, the Mighty and Majestic. Had it not been that I never go back on anything I have dedicated for the sake of Allah, I would have married her. Then he married her to (his servant) Nafi', and she became the mother of his child (umm walad).