Verse 28

ٱلَّذِينَ ءَامَنُوا۟ وَتَطْمَئِنُّ قُلُوبُهُم بِذِكْرِ ٱللَّهِ أَلَا بِذِكْرِ ٱللَّهِ تَطْمَئِنُّ ٱلْقُلُوبُ

These are the ones who have faith and their hearts are reassured when God is mentioned. Absolutely, by mentioning God, hearts will be reassured.