Dīkṣā-bhedaḥ (Types of Initiation) — Lalitopākhyāna: Hayagrīva–Agastya Dialogue
तत्तद्योजनसंख्यातमासेषु प्रणमेद्गुरुम् / अतिदूरस्थितः शिष्यो यदेच्छा स्यात्तदा व्रजेत्
tattadyojanasaṃkhyātamāseṣu praṇamedgurum / atidūrasthitaḥ śiṣyo yadecchā syāttadā vrajet
According to the number of yojanas, in the corresponding months one should bow to the Guru. A disciple who is exceedingly far away should go to him whenever the wish to do so arises.