Dua – Death as Martyr (Shaheed)
It is said in a Hadith Sharif that if a Muslim recites this verse 40 times during illness/sickness/disease and dies later then his/her death will be that of Martyrs (Shaheed). And if he/she gets well then his/her all sins will be forgiven.
This verse(Ayat) is also helpful in getting rid of troubles/problems/worries. And it also strengthens the dua if recited during dua.
(Hadith Book : Al-Hakim)
Sahl bin Hunaif (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, “He who supplicates Allah sincerely for martyrdom, Allah will elevate him to the station of the martyrs, even if he dies on his bed.” [Muslim].
(Riyad as-Salihin, Book 12, Hadith 1321)