When I killed Marhab, I brought his head to the Prophet ﷺ.
حدثنا حسين بن الحسن الأشقر حدثني ابن قابوس بن أبي ظبيان الجنبي عن أبيه عن جده
لما قتلت مرحبا جئت برأسه إلى النبي ﷺ
Its chain of transmission is very daif. Husayn bin Hasan Ashqar Fazari is very daif. Bukhari said in Kabir 1/2/282, "There is something questionable about him," and he said in Saghir 230, "He has manakir (objectionable narrations)." Abu Zura said, "His hadith is objectionable." Nasai said in Duafa 9, "He is not strong." In Tahdhib there is an account about Ahmad, that he narrated from him and did not consider him among those who lie, but then he was questioned about two of his hadiths and denied them strongly, as though he had no doubt that his hadith was fabricated. Likewise Ali bin Madini was certain that both were fabrications. In kh it reads "Husayn bin Husayn," which is an error, we corrected it from k and h, and from the books on the narrators.Ibn Qabus bin Abu Dhubyan is unknown, his name and his condition are not known. Al-Hafiz gave him an entry in Tajil 534, saying, "Ibn Qabus bin Abu Dhubyan, from his father, from his grandfather," then left it blank and wrote nothing about him. It is also mentioned in Tahdhib 8/305, in the entry on Qabus, "His son [narrated] from him, but he is not named." So this man is unknown both in identity and in condition.His father, Qabus bin Abu Dhubyan Junbi, is daif. Ibn Hibban said, "He had poor memory, and he would narrate alone from his father things that had no basis." Ahmad, Nasai, Ibn Saad, and Daraqutni all considered him daif, while Ibn Main deemed him trustworthy. Bukhari narrated in Kabir 14/1/193 from Jareer, who said, "We came to Qabus after he had declined." See also Jarh wa Tadil 2/3/145.His father, Abu Dhubyan Junbi, whose name was Husayn bin Jundab, was a trustworthy Tabii.Dhubyan is pronounced with a fatha on the dotted ظ. Junbi is pronounced with a fatha on the jim, a silent nun, and the unpointed ba, and it is a designation derived from Junb, a tribe from Yemen.