What is the ruling on wandering off during prayer?

Question:
I heard the questioner say: What is the ruling on swallowing saliva during prayer, looking at one’s garment during prayer, excessive uncontrollable thoughts, and forgetting to say some of the phrases in prayer, such as saying “Glory be to my Lord, the Most High,” and other thoughts that I am unable to keep away from me?

Answer:
Swallowing saliva does not harm; it does not harm the one who is fasting. In fact, saliva does not harm the fasting person. A little thinking does not harm, but as for a lot, one should strive to control oneself so as to leave off the intrusive thoughts. If one looks at something for repentance or for some need, there is no harm; it does not harm him. However, he should turn to his prayer and strive to control himself so that he turns his heart to his prayer, being present with his heart before Allah, occupying himself with the prayer and what is prescribed in it.