its existence or nonexistence. One must therefore revert to the basic presumption, namely that the intention is absent. Consequently, he must begin again. According to the author’s statement, however, this is qualified by the condition that he is not someone afflicted by frequent doubts. If he is someone who is constantly troubled by doubts—such that he never performs ablution without doubting, nor prays without doubting—then his doubt is of no consequence, because in that case it is merely obsessive misgiving.
Issue: If he is certain that he formed the intention but doubts its specification, then, if he is someone afflicted by frequent doubts, his doubt is of no consequence and he should continue his prayer. But if he is not someone afflicted by frequent doubts, his prayer is not valid as the particular prayer intended—except according to the view of those who do not stipulate specification and consider the intention to perform the prayer of that time sufficient. (1)
If a person praying alone changes his obligatory prayer into a voluntary prayer while there is ample time for it, this is permissible ..........
His statement, “If a person praying alone changes his obligatory prayer into a voluntary prayer while there is ample time for it, this is permissible,” begins the author’s discussion of the ruling on changing from one intention to another. Changing from one intention to another takes several forms:
One of them is the case mentioned by the author: “A person praying alone changes his obligatory prayer into a voluntary prayer while there is ample time for it; this is permissible.”
For example, a man begins the Zuhr prayer while praying alone, then during the prayer changes the obligatory prayer into a voluntary one. This is permissible, provided that there is ample time remaining for the prayer. But if the time is limited, such that only enough time for four rak‘ahs remains, then this change is not valid, because the remaining time has become designated for the obligatory prayer. Once it has become designated for the obligatory prayer, it is not valid to occupy it with anything else. If he does so, then the voluntary prayer is invalid, because he has performed a voluntary prayer during