G4828–συμμαρτυρέω–summartureō

in that they show the work of the law written in their hearts, their conscience bearing witness therewith, and their thoughts one with another accusing or else excusing [ergänzt: them]);

συμμαρτυρούσης summarturousēs “are bearing witness”

The Spirit himself beareth witness with our spirit, that we are children of God:

συμμαρτυρεῖ summarturei “bears witness with”

I say the truth in Christ, I lie not, my conscience bearing witness with me in the Holy Spirit,

συμμαρτυρούσης summarturousēs “while is bearing witness”