He was also asked:

Is it permissible to use a tooth-stick and comb one’s beard in the mosque?

He replied:

As for using a tooth-stick in the mosque, I know of no scholar who regarded it as disliked. Indeed, reports indicate that the early generations used tooth-sticks in the mosque. A person may spit or blow his nose into his clothing while in the mosque, by agreement of the imams and according to the reliably established Sunnah of the Messenger of Allah, may Allah bless him and grant him peace. Moreover, according to the majority of scholars, performing ablution in the mosque is permissible without being disliked. If ablution is permissible there, even though using a tooth-stick is part of ablution, and prayer is permissible there, even though a tooth-stick is used before prayer, how could using a tooth-stick be disliked? And if spitting and blowing one’s nose into one’s clothing are permissible there, how could using a tooth-stick be disliked?

As for combing the beard, some people regarded it as disliked only on the grounds that human hair, once detached, is ritually impure, and nothing ritually impure may be left in the mosque; or on the grounds that it is like a piece of litter. The majority of scholars, however, hold that human hair detached from the body is ritually pure. This is the position of Mālik and Abū Hanīfa, the apparent position of Ahmad’s school, and one of the two views within al-Shāfiʿī’s school. This is the correct view, for the Prophet