Tradition

Aasim b. Bahdalata narrates – We were assembled near Hajjaaj b. Yusuf (l.a.) when Husain b. Ali (a.s.) was mentioned. Hajjaaj said – He was not from the progeny of the Prophet (s.a.w.a.). Yahya b. Ya’mar, who was present in the assembly, protested – You have lied – O Ameer! Hajjaaj challenged him – Bring me evidence of what you claim from the Book of Allah, else I will certainly kill you. Yahya recited the verse – ‘…and of his descendants, Dawood and Sulaiman and Ayub and Yusuf and Moosa and Haroun. And Zakariya and Yahya and Isa and Ilyas (Surah Anaam (6): 84-85).
Yahya explained – Allah has informed that Esa is from Adam’s progeny through his mother. Likewise Husain b. Ali (a.s.) is from the progeny of Muhammad (s.a.w.a.) through his mother.
Hajjaaj (l.a.) conceded – You have spoken the truth. What drove you to challenge me in my own assembly?
Yahya replied – From what Allah has ordered the Prophets to explain to the people and not conceal (the truth) from them. As Allah has said – And when Allah made a covenant with those who were given the Book: You shall certainly make it known to men and you shall not hide it; but they cast it behind their backs and took a small price for it; so evil is that which they buy. (Surah Ale Imran (3): 187
Al-Mustadrak Alaa Al-Sahihain v 3 p 164