Due to this, the number of hadith accepted by Shi'a is far less than the hadith accepted by Sunnis, with many of the non-accepted hadith being ones that had to deal with integral aspects of Islam, such as prayer and marriage. In the absence of a clear hadith for a situation, the Shi'a prefer the sayings and actions of the Imams (Prophet's family members) on the similar level as the hadith of the Prophet himself over other ways, which in turn led to the theological elevation of the Imams as being infallible.[4][5]