In Sethian Gnostic texts, the Five Seals are typically described as a baptismal rite involving a series of five full immersions in holy running or "living water," symbolizing spiritual ascension to the divine realm.
The Five Seals are frequently mentioned in various Sethian Gnostic texts from the Nag Hammadi library.
[2] Tractates in the Nag Hammadi library that mention the Five Seals include:[1] The Holy Book of the Great Invisible Spirit, Trimorphic Protennoia, Zostrianos, and Apocalypse of Adam also mention Micheus, Michar, and Mnesinous as three heavenly guardian spirits presiding over the rite of baptism performed in the wellspring of Living Water, while Yesseus Mazareus Yessedekeus (i.e., Jesus of Nazareth the Righteous [ho dikaios]) is equated with the Living Water.
[1] I raised and sealed the person in luminous water with Five Seals, that death might not prevail over the person from that moment on.This quote has a parallel in Saying 19 of the Coptic Gospel of Thomas, attributed to Jesus.
[1] For there are five trees in paradise for you; they do not change, summer or winter, and their leaves do not fall.