Abu Sa'id Al-Khudri (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Exhort your dying men to recite: 'La ilaha illallah' (There is no true god except Allah)."[Muslim]. (DE)
App reference (DE): Book 7, Hadith 25 (DE)
Arabic/English book reference (DE): Book 7, Hadith 918 (DE)