prophets عَـلَـيْهِمُ السَّلَام never yawned; this thought will instantly suppress it.^[1] 

9.   Joking is already forbidden and is strictly impermissible in the masjid.

10.   Breaking wind in the masjid is prohibited.

11.   Stretching your legs towards the qiblah is prohibited everywhere, and one should avoid doing so towards any direction in a masjid, as it goes against the etiquette of such an honourable place.

Once, Sayyiduna Sari Saqati رَحْمَةُ الـلّٰـهِ عَلَيْه was sitting in the masjid alone, and he stretched his legs out. He heard a voice from a corner of the masjid saying, “Sari! Do people sit like this in the court of kings?” He immediately pulled his legs back and did not stretch them out again till his death.^[2] 

(Take care even when rocking babies/children and putting them to sleep ensuring that their legs are not towards the qiblah; it is also important to ensure that their front or back does not face the qiblah when helping them answer the call of nature).

12.   Entering a masjid with shoes on is an act of disrespect.

صَلُّوۡا عَلَى الۡحَبِيۡب                 صَلَّى اللّٰهُ عَلٰى مُحَمَّد

Dear Islamic brothers, indeed, the manners of a masjid are an extremely sensitive matter. One should pay great attention to it lest he violates the rights of the masjid due to a little carelessness. Shaykh of Tareeqah, Ameer of Ahl ul-Sunnah, founder of Dawat-e-Islami, ‘Allamah Maulana Abu Bilal Muhammad Ilyas ‘Attar Qadiri دَامَـتْ بَـرَكَـاتُـهُـمُ الْـعَـالِـيَـهْ takes great care