SB 5.21.12

evaṁ muhūrtena catus-triṁśal-lakṣa-yojanāny aṣṭa-śatādhikāni sauro rathas trayīmayo ’sau catasṛṣu parivartate purīṣu.
Synonyms: 
evam — thus; muhūrtena — in a muhūrta (forty-eight minutes); catuḥ-triṁśat — thirty-four; lakṣa — hundred thousands; yojanāni — yojanas; aṣṭa-śatādhikāni — increased by eight hundred; sauraḥ rathaḥ — the chariot of the sun-god; trayī-mayaḥ — which is worshiped by the Gāyatrī mantra (om bhūr bhuvaḥ svaḥ tat savitur, etc); asau — that; catasṛṣu — to the four; parivartate — he moves; purīṣu — through different residential quarters.
Translation: 
Thus the chariot of the sun-god, which is trayīmaya, or worshiped by the words om bhūr bhuvaḥ svaḥ, travels through the four residences mentioned above at a speed of 3,400,800 yojanas [27,206,400 miles] in a muhūrta.