Is it permissible to pass behind the place of prostration of the one praying?

The Shaykh : ...passing behind the place of prostration of the one praying, there is no prohibition in that. Accordingly, the hadith referred to in this last question should be understood in this light: when the Messenger of Allah (peace and blessings be upon him) was praying in the Ka'bah in al-Masjid al-Haram and people were circumambulating in front of him, the phrase "in front of him" should not be interpreted as meaning between his standing position and his place of prostration, but rather behind his place of prostration. This is all on the condition that the hadith is established, and it is not established.
Other than that?