Warning about the dangers of the Day of Judgement
Nahj al-Balāgha|Volume 1|Book 1|Chapter 204
ومن كلام له (عليه السلام) كان كثيراً ما ينادي به أصحابه
What Amīr al-mu’minīn said generally to his companions warning them about the dangers of the Day of Judgement