al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
ومن كتاب له (عليه السلام) إلى معاوية في أول ما بويع له، ذكره الواقدي في كتاب الجمل
To Mu‘āwiyah, soon after Amīr al-mu’minīn was sworn in. (Muḥammad ibn ‘Umar) al-Wāqidī has mentioned this in his “Kitāb al-Jamal”
Verified published translation — published with the edition, reproduced verbatim.
No licensed commentary edition has been cleared for reproduction, so the reader shows the text without it.
No licensed recording is connected, so none is offered.