Nasb-and-the-Nawasib

Could not get translation for this verse.
O Banū Hāshim how can there be affinity between us when Sayf ibn Arwā
(i.e. ʿUthmān) is by you 1 and so is his usurped belongings.
O Banū Hāshim if you do not give back, then his two killers and looter are
equal to us.
Banū Hāshim return the weapon of the son of your sister and do not loot it
for his property is inviolable.
You breached his trust in order to replace him in his position, just as the
courtiers of Kisrā did one day with him.
By Allah I will not forget the son of my mother as long as I live. And can a
person who drinks the water ever forget it. 2
Several factors contributed to the emergence of this false assumption. Hereunder
we enlist them:
Firstly, ʿAlī I did not arise to help the oppressed Khalīfah during the days he
was besieged, when he required his help, his support, and his defence the most;
especially when considering that the siege lasted for over a month. 3
1 This is attributing ʿUthmān I to his mother who was Arwā Bint Kurayz ibn Rabīʿah ibn Ḥabīb ibn
ʿAbd al-Shams. See: Akhbār al-Madīnah 2/132; Tārīkh Khalīfah ibn Khayyāṭ p. 156; Tārīkh al-Ṭabarī 2/692;
Tārīkh Madīnah Dimashq 39/8.
2 Al-Badʾ wa al-Tārīkh 5/207; Tārīkh Madīnah Dimashq 39/541; Simṭ al-Nujūm al-ʿAwālī 2/532; Maqtal
al-Shahīd ʿUthmān p. 210. I have previously indicated that Walīd ibn ʿUqbah stayed away from the
Fitnah. This poem although is insightful, but ostensibly he said it at the very beginning before matters
intensified.
3 Al-Bidāyah wa al-Nihāyah 7/177.
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