Passage
It’s also written in your law that the testimony of two people is valid.Deuteronomy 17:6; 19:15
John 8:17 (WEB)
Nearby Context
John 8:15 You judge according to the flesh. I judge no one.
John 8:16 Even if I do judge, my judgment is true, for I am not alone, but I am with the Father who sent me.
John 8:17 It’s also written in your law that the testimony of two people is valid.Deuteronomy 17:6; 19:15
John 8:18 I am one who testifies about myself, and the Father who sent me testifies about me.”
John 8:19 They said therefore to him, “Where is your Father?” Jesus answered, “You know neither me, nor my Father. If you knew me, you would know my Father also.”
Study Lenses
The verse centers on "written", "testimony", "people", "valid", and "deuteronomy". It is saying that the verse draws attention to "written" and "testimony", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "Even if I do judge my judgment..." into verse 18's "I am one who testifies about myself...", so "written" and "testimony" belong inside that flow. In John context, the local focus is the identity of Jesus, new birth, eternal life, and belief and unbelief.
A plain takeaway is to answer the verse's own emphasis on "written" and "testimony" with trust shaped by these words, not by a vague optimism outside the passage.