It means that...
It means that, as the Jews have oppressed us and started mischief at the very threshold of our house, we have undertaken this journey to stop this danger. The contents of the verses pleased the Prophet so much that he prayed for 'Amir. It so happened that 'Amir achieved martyrdom in this battle. The Army Of Islam Moves To An Unknown Destination The Prophet was very much interested in camouflage[^2] in the movement of troops.
He wished that none should know his destination so that he might come upon the enemies unawares and besiege their environs before they could take any necessary decision. It was also his idea that everyone of the allied enemies should think that he was the Prophet's target and they should, therefore, remain confined to their houses as a measure of precaution and should not join one another.
Some people thought that possibly the Prophet had undertaken this journey towards north to suppress the tribes of Ghatfan and Fazarah who were the allies of the Jews in the Battle of Ahzab. However, after reaching the desert of Raji', he directed the forces to move towards Khayber and thus cut off liaison between these two allies, and prevented the said tribes from coming to the help of the Jews of Khayber.
The result was that, although the siege of Khayber continued for one month, the said tribes could not render any assistance to their allies.[^3] The great leader of Islam advanced towards Khayber with 1600 warriors who included two hundred mounted soldiers.[^4] When they came near the region of Khayber the Prophet made the following invocation which is a proof of his pure intentions: "O Allah, Who are the Lord of the heavens and of whatever is below them, and the Lord of the earth and of whatever has thrown weight on it!........
I seek from You the goodness of this habitation and the goodness of its inhabitants and of whatever is in it and seek refuge in You from its evil and from the evil of its inhabitants and from the evil of whatever is placed in it".[^5] This invocation, made as an entreaty and that too in the presence of 1600 brave soldiers, is an evidence of the fact that he had not come to this land for conquest i.e. to expand his territory, or to take revenge.
On the contrary he had come to destroy this centre of danger which could possibly become a base for the idolaters, and his object was that the Islamic movement should not be threatened from this quarter.