قال الشيخ رحمه الله ولا تجوز الصلاة الى شئ من القبور حتى يكون بين الانسان وبينه حايل
The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: "It is not permissible to pray facing any of the graves unless there is a barrier between the person and the grave."
