Surah At-Tawbah – Verse 44 لا يَسْتَأْذِنُكَ الَّذِينَ...
Therefore, he does not go after taking permission to get a leave. Sometimes it happened that some Muslims persistently asked the Prophet (S) to send them to fight, but he had not the necessary possibilities, and, therefore, they wept. [^1] In going to Tabūk, when the Messenger of Allah (S) left Ali (as) in Medina as his substitute, he (as) did not feel at home. The Prophet (S) conforted him and told him that he (as) was, in situation to him (S), as Aaron was to Moses (as).
Thus, the true believers and true strivers do not flee from labour and tasks concerning Holy Struggle, and they devote both with their wealth and selves. Therefore, a believer is always prepared and ready to obey the Divine commandment. He does not seek for pretexts. So the faith in ‘origin and end’ is the main factor of piety, love of martyrdom, and attending in Holy Struggles.
The holy verse says: “Those who believe in Allah and the Last Day do not ask you for leave, (to be exempt) from striving with their possessions and their selves...” Then, it is by means of this manner that a pious person can be recognized at the time of war and in battlefields, not at home and during the time of peace.
“Only those ask leave from you who do not believe in Allah and the Last Day and their hearts are in doubt, so they waver in their doubt.”*** Those who, in the course of the Battle of Tabūk, came to the Prophet (S) and asked him to stay at home, were the very hypocrites and some Muslims of a weak faith, else those believers whose faith was safe and complete and did believe in Allah and the Resurrection Day never asked permission from the Prophet (S) to offend upon the subject of Holy Struggle.