Babak Khorramdin citations

Babak Khorramdin's letter to his son, rejecting the caliph’s amnesty message, quoted by Al-Tabari, edited by C. E. Bosworth, History of al-Tabari Vol. 33, The: Storm and Stress along the Northern Frontiers of the 'Abbasid Caliphate: The Caliphate of al-Mu'tasim A.D. 833-842/A.H. 218-227 https://books.google.com/books?id=Ky2rl0xN2SQC&pg=PA74&lpg=PA74&dq=%22Better+to+live+for+just+a+single+day+as+a+ruler+than+to+live+for+forty+years+as+an+abject+slave.%22&source=bl&ots=D6-WGySNBR&sig=9MJm8qw6MeNgY1kPHEjtcxA_okY&hl=en&sa=X&ved=0CCoQ6AEwAmoVChMI2YO62Pb0xwIVjOwUCh2l8APi#v=onepage&q=%22Better%20to%20live%20for%20just%20a%20single%20day%20as%20a%20ruler%20than%20to%20live%20for%20forty%20years%20as%20an%20abject%20slave.%22&f=false