Silsilah as-Sahihah 349 — Moderation in worship is preferred

Sayyiduna Sahl bin Abu Umamah bin Sahl bin Hunaif narrates from his father, and he from his grandfather, that the Prophet Muhammad (peace and blessings be upon him) said: “Do not be harsh upon yourselves in matters of religion, for those before you were destroyed because of their harshness upon themselves. Even now, you can see the remnants of such people in churches and the monasteries of monks.”