Srimad-Bhagavatam: Canto 5 - Chapter 1 - Verse 12
Sanskrit:
एवं मुहूर्तेन चतुस्त्रिंशल्लक्षयोजनान्यष्टशताधिकानि सौरो रथस्त्रयीमयोऽसौ चतसृषु परिवर्तते पुरीषु ॥ १२ ॥
ITRANS:
evaṁ muhūrtena catus-triṁśal-lakṣa-yojanāny aṣṭa-śatādhikāni sauro rathas trayīmayo ’sau catasṛṣu parivartate purīṣu.
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.