al-Misri, d. 1367, shafi’i. Umdat al Salik (Reliance of the Traveler), 09.1.
Jihad is a communal obligation,” meaning upon the Muslims each year.
In this quote, we learn that the communal obligation to perform Jihad is annual. Jihad is not an anachronism which can be ignored, it must be performed every year until the entire world is conquered.
If none of those concerned perform jihad, and it does not happen at all, then everyone who is aware that it is obligatory is guilty of sin, if there was a possibility of having performed it.You should understand that Jihad is mandatory, and that neglecting it is sinful.