Imam Ali (AS) said:

Swear to my life, I will not relax for a moment to fight against those who oppose the truth, and those who are sunk in corruption and deviation. Therefore, O’ the servants of God, fear Allah (SWT), and escape from God to God (be steadfast and strong in the way of God), and step in the way which has been opened for you, and keep up your duties and rules allocated for you. If you do so, Ali will guarantee your victory in future, even though you have not attained it now [1].

[1] Nahjul Balaghah, Sermon 24.

Source: en.shafaqna.com