Matthew 10:14
And whoever does not welcome you or listen to what you have to say, shake the dust off of your shoes as you leave that house or town. [Note: This was a Jewish custom showing disdain and intended to suggest unworthiness]
Luke 10:16
The person who listens to you, [actually] listens to me. And the person who rejects you, [actually] rejects me. And the person who rejects me, [actually] rejects Him who sent me [i.e., God]."
John 12:48
The person who rejects me and does not accept my message has One who [will] judge him. The message that I have spoken will judge him on the last day [i.e., the judgment day].
John 20:23
Whosever sins you forgive, they will be forgiven [by God]. And whosever sins you do not forgive, they will not be forgiven [by God]." [Note: Actual forgiveness would result only when people responded, by faith, to the Gospel message. See Acts 2:37-38].
1 Thessalonians 4:2
For you know [i.e., are aware of] the instructions we gave you by the authority of the Lord Jesus.
1 Thessalonians 4:8
So, the person who rejects [this exhortation] is not [merely] rejecting what man says but God [Himself], who gives His Holy Spirit to you.
1 Timothy 5:20
You should rebuke in front of everyone [in the church] those elders who continue to sin, so that the rest [of the congregation] will be afraid [of sinning].
Hebrews 10:26-29
For if we go on sinning intentionally, after we have received the full knowledge of the truth, there is no longer any sacrifice for [our] sins.