'Solemnly' in the Bible

So after Peter and John had solemnly testified and spoken the word of the Lord, they started back to Jerusalem, proclaiming the good news to many Samaritan villages as they went.

In this matter no one should violate the rights of his brother or take advantage of him, because the Lord is the avenger in all these cases, as we also told you earlier and warned you solemnly.

I call on you solemnly in the Lord to have this letter read to all the brothers and sisters.

Before God and Christ Jesus and the elect angels, I solemnly charge you to carry out these commands without prejudice or favoritism of any kind.

Remind people of these things and solemnly charge them before the Lord not to wrangle over words. This is of no benefit; it just brings ruin on those who listen.

I solemnly charge you before God and Christ Jesus, who is going to judge the living and the dead, and by his appearing and his kingdom: