Rom.11.22Note then the kindness and the severity of God: severity toward those who have fallen, but God’s kindness to you, provided you continue in his kindness. Otherwise you too will be cut off.
1Cor.14.7If even lifeless instruments, such as the flute or the harp, do not give distinct notes, how will anyone know what is played?
2Thess.3.14If anyone does not obey what we say in this letter, take note of that person, and have nothing to do with him, that he may be ashamed.