Sh. Sālih Al-Fawzān said:
It is hated to wipe whatever attaches to the forehead or nose during the Salāh.
[Al-Mulakhas al-Fiqhī, (1/2.7)]
Shaykh Saalih bin ‘Abdil-‘Azeez Aalee Shaykh hafidahoellaah said:
"There is no such thing as ”study time” for the student of knowledge! This is because all of his time is spent in seeking knowledge. In the morning and in the evening, his mind is preoccupied with the various issues of knowledge."
Al-Manhajiyyah fee Talabil-‘Ilm
"…And from the acts of worship whose reward is multiplied during the heat is fasting, and this is because of the thirst that one experiences in the mid-day heat.
This is why Mu’adh bin Jabal expressed regret on his deathbed that he would no longer experience this mid-day…