Religious moderation is the moderate understanding, worship, and muamalah attitudes in applying the teachings of the religion adopted, so that they are balanced, not extreme and not disparaging. This article aims to explore the hadiths nabawi becoming the basis for being moderate in Islam, either in aqidah, worship, or muamalah. This will result in a complete understanding of true religious moderation. It was a qualitative research with a library research type, and the data analysis techniques employed were inductive and deductive. The results of the study indicated that there are several hadiths that prohibit Muslims from being extreme in religion, either in aqidah, worship, or muamalah with others. The existing sahih hadiths engage us to understand and practice religion passing through the path of balance and staying in the middle way so that religion seems friendly, gentle and affectionate. The principle of moderation in religion (wasathiyah) which is explained in the hadith nabawi is the one of al-khairiyah (being the best), al-tawazun (balancing), raf’u al-haraj (removing troubles), and al-tasamuh (being tolerant).