βεβαίωμα
From LSJ
ἀλλ' εἰ μὲν ἁγνόν ἐστί σοι Πειθοῦς σέβας, γλώσσης ἐμῆς μείλιγμα καὶ θελκτήριον → but if you have holy reverence for Persuasion, the sweetness and charm of my tongue
English (LSJ)
ατος, τό,
A confirmation, proof, J.AJ2.12.4, 17.1.1.
Greek (Liddell-Scott)
βεβαίωμα: τό, βεβαίωσις, ἀπόδειξις, ἐπικύρωσις, Ἰώσηπ. Α. Ι. 2. 12, 4, πρβλ. 17. 1, 1.