Aslwkm:- Once i recite Namaz e Janaza(Padaya) after that i came to know that i was impured and suppose to make a gusul.
without gusul i recite a namaz a janaza in (Napaki).
please suggest me on this and please pray May ALLAH forgive me for this sin.
There is no Qadha for Janazah prayer. Therefore, if you performed Janazah prayer in the state of impurity then you should just make Istighfar and seek forgiveness from Allah.
And Allah knows best.