'Spotless' in the Bible

(The Shulammite Bride)“I was asleep, but my heart was awake.A voice [in my dream]! My beloved was knocking:‘Open to me, my sister, my darling,My dove, my perfect one!For my head is drenched with the [heavy night] dew;My hair [is covered] with the dampness of the night.’

No lie was found in their mouth, for they are blameless (spotless, untainted, beyond reproach).