NAHJUL BALAGHA
SERMON 24
By my life there will be no regard for anyone nor slackening from me in fighting against one who opposes right or gropes in misguidance. O’ creatures of Alláh, fear Alláh and flee unto Alláh from His wrath (seek protection in His Mercy). Tread on the path He has laid down for you and stand by what He has enjoined upon you. In that case `Alí would stand surety for your success (salvation) eventually even though you may not get it immediately (i.e. in this world).