Troubles which would arise, Day of Judgment
Nahj al-Balāgha|Volume 1|Book 1|Chapter 116
أَرْسَلَهُ دَاعِياً إِلَى الْحَقِّ، وَشَاهِداً عَلَى الْخَلْقِ، فَبَلَّغَ رَسَالاَتِ رَبِّهِ غَيْرَ وَان وَلاَ مُقَصِّر، وَجَاهَدَ فِي اللهِ أَعْدَاءَهُ غَيْرَ وَاهِن وَلاَ مُعَذِّر، إِمَامُ مَنِ اتَّقَى، وَبَصَرُ مَنِ اهْتَدَى.
Allāh deputed him (the Prophet) as a caller towards Truth and a witness over the creatures. The Prophet conveyed the messages of Allāh without being lazy and without any short-coming, and he fought His enemies in the cause of Allāh without being languid and without pleading excuses. He is the foremost of all who practice piety and the power of perception of all those who achieve guidance.