calming those who are afraid
Syuaib (peace be upon him) said to Musa (peace be upon him): "Do not be afraid. You are now safe from the wrongdoing people." (Qur'an, Al-Qashash: 25)
The angels said: "Do not be afraid. We are indeed the messengers sent to the people of Luth." (Qur'an, Hud: 70)
The Prophet Muhammad ﷺ, when returning from a journey on Abu Thalhah's horse, said: "You do not need to be afraid." (Hadith, HR. Al-Bukhari 290 and Muslim 2307, from Anas bin Malik)
Telling good news and helping calm someone who is scared is an act of ihsan (doing good).
(from Syajaratul Ma‘arif, Syaikh al-‘Izz bin Abdus Salam)