Talqin means prompting someone to remember words. The relevant prophetic report says:
لَقِّنُوا مَوْتَاكُمْ لَا إِلَهَ إِلَّا اللَّهُ
Translation: Prompt those nearing death to say “There is no deity but Allah.”
Prompting a living person near death must be distinguished from later discussions about address at the grave.