When Amir al-Mu’minin decided to march towards Syria, he spoke thus:
My Allah, I seek Your protection from the hardships of the journey, from the grief of returning and from the scene of devastation of property and men. O Allah, You art the companion in journey and You art one who is left behind for (protection of the) family. None except You can join these two because one who is left behind cannot be a companion on a journey nor one who is in company on a journey at the same time can be left behind.
Sayyid ar-Radhi says the following: the earlier part of his sermon is related from the Prophet (P.B.U.H. and His Household) but Amir al-Mu’minin has completed it very aptly by adding most eloquent sentences at the end. This addition is from A None except You can join up to the end.