I have heard, if anybody talks during azaan, he/she will not be able to say kalima during death. Please let me know how far it is true and also please let me know the reference of hadith.
Answer:
(Fatwa: 2294/1877=B/1429)
It is baseless; we do not know any such hadith. It is desirable to be silent and respond while azam is called. Responding azan is not obligatory or wajib (necessary).
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband