HAJIIJ NAFSIH

إِنْ يَخْرُجْ وَأَنَا فِيكُمْ فَأَنَا حَجِيجُهُ دُونَكُمْ

 وَإِنْ يَخْرُجْ وَلَسْتُ فِيكُمْ

 فَامْرُؤٌ حَجِيجُ نَفْسِهِ وَاللَّهُ خَلِيفَتِي عَلَى كُلِّ مُسْلِمٍ

If he comes forth while I am among you, I shall contend with him on your behalf, but if he comes forth while I am not amongst you, a man must contend on his own behalf and Allah would take care of every Muslim on my behalf (and safeguard him against his evil).

Reference : Sahih Muslim 2937 a
In-book reference : Book 54, Hadith 136
USC-MSA web (English) reference : Book 41, Hadith 7015