The answer is: 8th

Lev 12:3

In Leviticus 12:3, the instruction for the circumcision of male babies on the eighth day aligns with a rich tapestry of symbolism and significance in biblical literature. This day of circumcision carries both cultural and spiritual meaning, implying completion and new beginnings. In many ancient Near Eastern cultures, the number eight symbolized a new order, akin to how the eighth day can be seen as the start of a new week after the Sabbath rest – a fresh commencement of sorts.

Fun fact: the practice isn't merely a health measure; it served as a physical covenant with God, representing a commitment to His laws and a belonging to the wider community of Israel. Surprisingly, Moses himself wasn't circumcised at birth, which created a critical moment narrated in Exodus where God nearly struck him down (Exo 4:24-26). This event underlined the importance of the covenant, demonstrating how central this act of obedience was in affirming divine promises.

In a wider context, the eighth day ritual echoes themes found throughout scripture. Just as the Hebrew people circled Jericho on the seventh day and broke the walls on the eighth, this symbolism transcends mere tradition. It serves as a reminder of covenant responsibilities while marking entry into a life of holiness and commitment—a journey that pattern is echoed through the ages, from the initiation practices in early Christianity to modern spiritual beliefs that explore identity and belonging. This notion of covenant, of marking personal significance in a community, transcends cultures and remains relevant today!