Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) narrates a marfu' hadith that the Prophet (peace and blessings be upon him) said: "Everything has a place of honour, and the most honourable of gatherings is the one in which one faces the qiblah. Do not pray behind one who is sleeping or one who is talking. Kill the snake and the scorpion even if you are in your prayer. And do not cover walls with cloth."
This has also been narrated through another, broken (munqati') chain, and no chain on this is established.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14588