'Truly' in the Bible

“I assure you and most solemnly say to you, all sins will be forgiven the sons of men, and all the abusive and blasphemous things they say;

Any place that does not welcome you or listen to you, when you leave there, shake the dust off the soles of your feet as a testimony against them [breaking all ties with them because they rejected My message].”

He replied, “Rightly did Isaiah prophesy about you hypocrites (play-actors, pretenders), as it is written [in Scripture],‘These people honor Me with their lips,But their heart is far from Me.

And Jesus said to them, “I assure you and most solemnly say to you, there are some of those who are standing here who will not taste (experience) death before they see the kingdom of God after it has come with power.”

For whoever gives you a cup of water to drink because of your name as followers of Christ, I assure you and most solemnly say to you, he will not lose his reward.

I assure you and most solemnly say to you, whoever does not receive and welcome the kingdom of God like a child will not enter it at all.”

Jesus said, “I assure you and most solemnly say to you, there is no one who has given up a house or brothers or sisters or mother or father or children or farms, for My sake and for the gospel’s sake,

I assure you and most solemnly say to you, whoever says to this mountain, ‘Be lifted up and thrown into the sea!’ and does not doubt in his heart [in God’s unlimited power], but believes that what he says is going to take place, it will be done for him [in accordance with God’s will].

The scribe said to Him, “Admirably answered, Teacher; You truthfully stated that He is One, and there is no other but Him;

Calling His disciples to Him, He said to them, “I assure you and most solemnly say to you, this poor widow put in [proportionally] more than all the contributors to the treasury.

Jesus said to him, “I assure you and most solemnly say to you, this very night, before a rooster crows twice, you will deny [that you even know] Me three times.”