I heard the Messenger of Allah (Sallallaahu ‘alaihi wasallam) saying:
“Whenever a Muslim supplicates for his (Muslim) brother in his absence, the angels say: `May the same be for you too’.”
This Hadith makes it evident that one who prays for someone in his absence also stands to benefit from it because the angel appointed for the task of praying for those who pray for others will pray for him, saying, “O Allah! Grant him also the same which he has asked for others.”
Please Share this Hadith with your relatives & friends and may Allah SWT reward you.