The World Federation One Stop Fiqh

Ruling 2677

If a person vows to visit [i.e. go for ziyārah to] the burial place of a specific Imam (ʿA), such as His Eminence Abā ʿAbdillāh [Imam al-Ḥusayn] (ʿA), in the event that he goes for ziyārah of another Imam (ʿA), it is not sufficient. If he is unable to go for ziyārah of that particular Imam (ʿA) owing to a legitimate excuse, then nothing is obligatory for him [concerning this matter].