Both reasons are baseless and false.

I sit in mosque after salah to read Qur’an. While sitting on either a chair or on the floor, I keep the Qur’an on my lap. Sometimes people object and say: 1) I should not sit behind any person while reciting Qur’an as it faces the back of the person and it is against etiquette. 2) I should not keep the Qur’an on my lap instead hold it high or place it on a Qur’an holder. Please advise.

Reading/Reciting the Quran |