Could you help me finding a poem?

[Taliesin]

It was something about adding three feet of earth when digging grave and then saying for what these three feet were for. There was also something about light too.
Does anybody know this poem?

[Sitaram]

http://www.cowboypoetry.com/lb.htm


or this poem

http://www.readbookonline.net/readOnLine/3135/

I know this next url is not it, but it is so weird and interesting

http://www.kavitanjali.com/chains/cd1.htm