Matthew 10:14-15
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 10:10-12
But whatever town you enter that does not welcome you, go out into its streets and say [to them],
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]."
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.