from the sermons of Imam Ali (pace be upon him ):sermon24

Exhorting people for jihad

from the book Sermons of Imam Ali Investigation by Saleh

Nahjul Balagha Part 1 The Sermons Sharif Razi

Source: https://al-islam.org/nahjul-balagha-part-1-sermons

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 Allah, fear Allah and flee unto Allah 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 ‘Ali would stand surety for your success (salvation) eventually even though you may not get it immediately (i.e. in this world).

Alternative Sources for Sermon 24

(1) Ibn al-‘Athir, al-Nihayah, III, 244 (‘a.s.b).