Abdullaah Bin Ahmad Bin Hanbal (rahimahullaah) said: I heard my father saying: ”Yahyah Al-Qattaan related to me (about such and such).  My eyes have never seen (someone) similar to him.” [Sifatus Safwa: 3/365]

Imaam Dhahabi (rahimahullaah) said: ”He (Yazeed) was a figurehead in knowledge, trustworthiness and a great proof.” [Siyar A’laam Nubulaa: 9/358]

Ibn Abee Haatim (rahimahullaah) said: I asked my father about Yazeed Bin Haaroon, so he said: ”Reliable, an Imaam and truthful in hadeeth.  The likes of him should not be asked about.” [Al-Jarh Wat-tadeel: 9/295]

Imaam Dhahabee (rahimahullaah) said: ”Indeed, Yazeed was a figurehead in the Sunnah, having enmity towards the Jahmiyyah and rejected their false interpretations regarding Allaah’s Istiwaa.’’ [Siyar A’laam Nubulaa: 9/362]