Hadith #984 (Jami' al-Tirmidhi)
Book: The Book on Jana''iz (Funerals)
Narrator(s): Abd al-Qdws bin Bakr عبد القدوس بن بكر بن خنيس, Ahmed bin Manay' أحمد بن منيع, Bilal bin Yahya al-Bsy بلال بن يحيى العبسي الكوفي, Habib bin Slym al-Bsy حبيب بن سليم العبسي, Hudhayfah ibn al-Yaman

The Prophet said: “Beware of An-Na’i, for indeed announcing one’s death is from the deeds of Jahliyyah.”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-984/