If anyone does not remain in me he is thrown aside like a branch and he withers up; then the branches are gathered and thrown into the fire to be burned.
and noticing a fig tree by the roadside he went up to it, but found nothing on it except leaves. He said to it, "May no fruit ever come from you after this!" And instantly the fig tree withered up.
See that you do not refuse to listen to His voice. For if they failed to escape, who refused to listen to their instructor upon earth, much less shall we escape, if we discard Him who speaks from heaven.