'Distrust' in the Bible

yet he has no [substantial] root in himself, but is only temporary, and when pressure or persecution comes because of the word, immediately he stumbles and falls away [abandoning the One who is the source of salvation].

At that time many will be offended and repelled [by their association with Me] and will fall away [from the One whom they should trust] and will betray one another [handing over believers to their persecutors] and will hate one another.

Peter replied to Him, “Though they all fall away because of You [and doubt and disown You], I will never fall away!”