An accurate understanding of the concept of the Sunnah is required to obtain accurate conclusions from assessments, discussions, and studies within the context of the Sunnah. This understanding is possible through comprehensive examination of the awareness of the Sunnah among the Companions (.a.abah), who witnessed the age of the Prophet in every aspect. Indeed, current discussions and studies of the Sunnah highlight a single aspect of the problem. On some occasions, the concept "Sunnah" is presented within a reductive approach as narratives (riwayah) that offer jurisprudential solutions for secondary problems. Other times, behavior-centered definitions transform the Sunnah into a domain that can be experienced only at the imitative level. Consequently, the multidimensional structure of the concept is restricted, and it becomes nonfunctional in terms of providing a way of thinking and a perception of the world. In this paper, due to the vastness of subject, this problem is examined on the basis of a single example, namely,. Abd Allah ibn Mas'ud (d. 32/652), a prominent Companion.