The phrase "You know they don't allow [something] in there" is a common way to express that a particular activity or behavior is not permitted in a certain place or situation.
In this case, the complete sentence would be: "You know they don't allow eating and drinking in there."
حضور صلی اللہ علیہ وسلم نے جنوبی یمن کا گورنر کس کو بنایا تھا؟
A. Hazrat Amer Ibn Alas (R.A)
B. Hazrat Abu Musa Ashri (R.A)
C. Hazrat Ali (R.A)
D. Hazrat Maaz Bin Jabal (R.A)
Explanation
Muadh ibn Jabal was a sahabi of the Islamic prophet Muhammad. Muadh was an Ansar of Banu Khazraj and compiled the Quran with five companions while Muhammad was still alive. He was known as the one with a lot of knowledge. He was called by Muhammad "the one who will lead the scholars into Paradise."