Four pillars of faith and unbelief
Nahj al-Balāgha|Volume 1|Book 3|Chapter 31
٣١. وسُئِلَ (عليه السلام) عَنِ الْإِيمَانِ، فَقَالَ: الْإِيمَانُ عَلَى أَرْبَعِ دَعَائِمَ: عَلَى الصَّبْرِ، والْيَقِينِ، وَالْعَدْلِ، وَالْجَهَادِ.
31. Amīr al-mu’minīn, peace be upon him, was asked about faith. He said: Faith stands on four supports: on endurance, conviction, justice and jihād (fighting in the way of Allāh).