I don’t know of such a hadeeth!
The hadith is:
“Whoever recites Aayatul Kursi after every Fard (Fard Salah),… …only death is keeping him/her from entering Jannah. (As soon as he/she dies, will enter Jannah) (Nisa’i, Ibne Habban, Ibnelsani A’n Abi Amatah Albahili Radiallah Anhu)