'Solemnly' in the Bible

And with many other words he solemnly urged and exhorted them, saying, "Be saved from this crooked generation!"

So [when] they had solemnly testified and spoken the word of the Lord, they turned back toward Jerusalem, and were proclaiming the good news [to] many villages of the Samaritans.

And he commanded us to preach to the people and to testify solemnly that this one is the one appointed by God [as] judge of the living and of the dead.

Now when both Silas and Timothy came down from Macedonia, Paul began to be occupied with the message, solemnly testifying to the Jews [that] the Christ was Jesus.