It is reported that Sayyiduna Uthman ibn Affan (al-Ghani/Dhul Nurayn) – (579-656 C.E), May Allah be well pleased with him, said in a Friday Sermon [Khutbah].
O! Children of Adam! Know that the angel of death has been assigned to each and every one of you, and that angel has not ceased to pass by you every single day, and this has happened every day since you were born.
It is as if this angel wants to move on to something else, yet it cannot, for it has been assigned to you and will target you one day.
Therefore, it is best to be prepared and to be careful by correcting your deeds, meaning one should only do good knowing that the angel is near you.
You must not forget him, for that angel does not forget about you.
Realize, O Children of Adam, if you end up being forgetful about any of this and you do not prepare for it, remember no one else will prepare this journey for you.
You are the one that must meet Allah the Mighty and Majestic, and you are the one who will be questioned, so please take care of yourself and do not leave taking care of yourself to someone else. Peace be upon all of you.”
(Related by Imam Abu Bakr Al-Daynuri in his book – Al-Mujalasah wa Jawahir Al-ʿIlm – The Assembly of the Jewels of Knowledge)
1) Sayyiduna Uthman was married to two daughters of Prophet Muhammad ibn Abdullah, Peace and blessings of Allah be upon him, his family and companions.
2) The names of these daughters of Rasul Allah are – 1) Ruqayyah and 2) Umm Kulthum, Peace be upon them.
3) Because of the above blessings of marriage, Allah allowed his nickname to become = Dhul-Nurayn or The Possessor of the Two Lights.
May Allah be well pleased with Sayyidina, Caliph Uthman ibn Affan, RadiAllahu Anhu.