where is this quote from?

[HerenIstarion]

As Squatter kindly reminded me, Tharkûn is spelled with h after T, not without. I stand corrected (H-I makes mental note to check textual evidence before giving lectures on any subject). To make my amends, here is the whole quote with all proper diacritics:

Many are my names in many countries, he said. Mithrandir among the Elves, Tharkûn to the Dwarves; Olórin I was in my youth in the West that is forgotten, in the South Incánus, in the North Gandalf; to the East I go not.'

Thus spake Faramir the Wise to Frodo the Ringbearer and Sam the Faithful in Ithilien...

My apologies for misinofrmation provided