Correction of the name: In some manuscripts this name has been miswritten as "Na'il". However, al-Daraqutni and 'Abd al-Ghani bin Sa'id recorded it with the "single-dotted letter" (i.e. with ba'), and this is what is relied upon, even though in many hadith sources the name repeatedly appears miswritten with the lower-dotted ya' or with hamzah.

Grading of the chain: This chain is "da'if". Ibn 'Umar (i.e. Muhammad bin 'Umar al-Waqidi) is alone in narrating it, and what he alone narrates is not given weight.

Reference / Sources: Ibn Sa'd narrated it in "al-Tabaqat" (6/ 393), and through his route Ibn 'Asakir (13/ 295), from Muhammad bin 'Umar al-Waqidi, with this chain. However, he said: "The women of Banu Hashim mourned al-Hasan bin 'Ali for a year." Likewise al-Tabari transmitted it from him in "Dhayl al-Mudhayyal" (as in its "al-Muntakhab" by 'Arib al-Qurtubi, printed at the end of "Tarikh al-Tabari" 11/ 514).