'Solemnly' in the Bible

For I solemnly warned your fathers in the day that I brought them up from the land of Egypt, even to this day, warning persistently, saying, “Listen to My voice.”

But, if you do not obey these commands, I solemnly swear that this palace will become a pile of rubble. I, the Lord, affirm it!"

“For I will prepare and appoint destroyers [to execute My judgments] against you,Each with his weapons;And they will cut down your [palaces built of] choicest cedarsAnd throw them in the fire.

"I, the Lord, also solemnly assert: 'King Zedekiah of Judah, his officials, and the people who remain in Jerusalem or who have gone to live in Egypt are like those bad figs. I consider them to be just like those bad figs that are so bad they cannot be eaten.

For I solemnly swear," says the Lord, "that Bozrah will become a pile of ruins. It will become an object of horror and ridicule, an example to be used in curses. All the towns around it will lie in ruins forever."

The Lord who rules over all has solemnly sworn, 'I will fill your land with enemy soldiers. They will swarm over it like locusts. They will raise up shouts of victory over it.'