The Peak of Eloquence · Hadith 1259 (#Passage #68)

ومن كتاب له (عليه السلام) إلى عبد الله بن عباس وهو عامله على البصرة

To ‘Abdullāh ibn al-‘Abbās, his Governor of Baṣrah

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).