What is the significance of praying in different locations, during any given praying session which involves obligatory (farz) and recommended (mustahab/nafil) prayers?
Different locations here also include those which are apart by as small as 6" (roughly speaking).
Reading here I found out that this action is derived from the saying of the Prophet(saww) that every place that one prays at shall stand witness to your faith on the day of judgment.
Was anything similar to this practiced by the Prophet(saww)?
From what I have heard is that he was very particular of where he did what and had a rationale for each. And even the pillars of the Nabavi mosque were named in accordance to it.