Is expiation required from someone who swore to do something, but the act was completed before he could do it a second time?

The question implies that fulfilling the oath is no longer possible. Scholars have categorized impediments to fulfilling an oath into intellectual, religious, and customary. These impediments can occur either before or after the oath, and they may be immediate or delayed. Therefore, the questioner must specify what was sworn upon and the impediment to its completion so that an answer can be provided.