Ask forgiveness for the believers — a good deed for each one. The Prophet ﷺ said: “Whoever seeks forgiveness for the believing men and believing women, Allah writes for him a good deed for every believing man and woman.” (al-Ṭabarānī — ḥasan). And the believers number in the billions.
العربية: عن عبادة بن الصامت رضي الله عنه أنّ رسول الله ﷺ قال: «مَن استغفر للمؤمنين والمؤمنات كتب الله له بكل مؤمنٍ ومؤمنةٍ حسنة». (الطبراني وحسّنه الألباني).
Add to your daily dhikr: “Allāhumma-ghfir lil‑muʾminīna wal‑muʾmināt” — good deeds beyond counting.