Make du'a for your brothers

Abud-Darda' (May Allah be pleased with him) reported:

I heard the Messenger of Allah (ﷺ) saying, "Whenever a Muslim supplicates for his (Muslim) brother in his absence, the angels say: 'May the same be for you too'."

[Hadith reported by Imam Muslim]

وعن أبي الدرداء رضي الله عنه أنه سمع رسول الله صلى الله عليه وسلم يقول‏:‏ ‏ "‏ما من عبد مسلم يدعو لأخيه بظهر الغيب إلا قال الملك ولك بمثل‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏

Hadith reported by: Imam Muslim

Reference : Riyad as-Salihin 1494

In-book reference : Book 16, Hadith 30