Note 40
From Chapter 42 of the Decline & Fall

He offered his own wife and sister to the prophet; but the prayers of Nushirvan saved his mother, and the indignant monarch never forgave the humiliation to which his filial piety had stooped:

pedes tuos deosculatus (said he to Mazdak,) cujus fætor adhuc nares occupat, (Pocock, Specimen Hist. Arab. p. 71.)