Did the scholars say: Jihad becomes an individual obligation when the enemy attacks a land among the lands of the Muslims?

Question:
Honorable Shaykh, may Allah grant you success, there are many questions asked about what is happening in Iraq and in Palestine, and this is one of them. He says: We face a problem with many people, which is their statement that the scholars mentioned in their early and recent works that jihad becomes an individual obligation in cases, one of which is when the enemy attacks a land among the lands of the Muslims.

Answer:
No, they did not say "a land among the lands of the Muslims." They say "the land of the Muslims." If they attack the land in which you are, it is obligatory for you. As for other lands, it is not obligatory for you. They did not say "a land among the lands of the Muslims"; they said "his land," if the enemy attacks his land.