Imaam Abu Haatim (rahimahullaah) said: There is evidence in this narration similar to a command to disparage the Du’afaa
Narrated Sa’id bin Al-Musaiyab: ‘Umar came to the mosque while Hassaan was reciting a poem. (‘Umar disapproved of that). On that Hassaan said, “I used to recite poetry in this very mosque in the presence of one (i.e. the Prophet ) who was better than you.” Then he turned towards Abu Hurairah and said (to him), “I ask you by Allah, did you hear Allah’s Messenger saying (to me), ‘Retort on my behalf. O Allah! Support him (i.e., Hassaan) with the Ruh Al-Qudus [i.e. Jibril (Gabrael)]?” Abu Hurairah said, “Yes.” 
Imaam Abu Haatim (rahimahullaah) said: There is evidence in this narration similar to a command to disparage the du’afaa. That is because the Prophet (sallal-laahu-alayhi-wasallam) said to Hassaan (radiyallaahu-anhu), ‘’Retort on my behalf.’’ He (sallal-laahu-alayhi-wasallam) commanded [Hassaan (radiyallaahu-anhu)] to defend him against the lies that the idol worshippers used to utter about him.
And if it is the case that the Messenger of Allaah (sallal-laahu-alayhi-wasallam) commanded (Hassaan) to defend him against the lies of the idol worshipers, even though their lies did not harm the Muslims, and neither did they declare what is Haraam to be Halaal nor what is Halaal to be Haraam due to (those lies); then it is more proper that he (sallal-laahu-alayhi-wasallam) is defended against those Muslims who lie about him (sallal-laahu-alahu-wasallam) through their (weak, fabricated) narrations and thus declare what is Haraam to be Halaal and what is Halaal to be Haraam.
 Source: Bukhaari Vol 4; Hadeeth Number 3212; Darus Salaam Print]
 Source: [Muqaddimah Kitaab Al-Majrooheem Minal Muhadditheen of Imaam Ibn Hibbaan (rahimahullaah). Page: 67-68]