This research paper, [The Speed of Light and Puranic Cosmology](http://arxiv.org/pdf/physics/9804020), by [Subash Kak](https://en.wikipedia.org/wiki/Subhash_Kak) discusses the various notions of distance between places and also the speed of Sun, light etc.

It mentions that the speed of light is mentioned in the [Taittiriya Brahmana](https://en.wikipedia.org/wiki/Taittiriya_Shakha) of the Yajurveda (in a commentary by *Bhatta Bhaskara*). This speed is also mentioned to be part of an old *puranic* tradition.

The speed of light is mentioned as **2,202 yojanas per half nimesa** which **converts to the correct speed of light** (186,000 miles per second).

Question: What is the Shloka where the mention to speed of light is found?