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Śrīmad-Bhāgavatam
[Canto 1, Ch. 9]
Muni. He begot six sons (like the fire-god) by his wife Candramāsī, one of the reputed stars. He could travel in space, and therefore he could present himself even in the planets of Brahmaloka and Indraloka. He advised the King of heaven, Indra, about conquering the demons. Once he cursed Indra, who thus had to become a hog on the earth and was unwilling to return to heaven. Such is the power of the attraction of the illusory energy. Even a hog does not wish to part with its earthly possessions in exchange of a heavenly kingdom. He was the religious preceptor of the natives of different planets.
TEXT 9
तान् समेतान् महाभागानुपलभ्य वस्त्रमः । पूजयामास धर्मज्ञो देशकालविभागवित् ॥ ९ ॥
tān sametān mahā-bhāgān upalabhya vasūttamaḥ pūjayāmāsa dharma-jño deśa-kāla-vibhāga-vit
tān —all of them;  sametān —assembled together;  mahā-bhāgān —all greatly powerful;  upalabhya —having received;  vasūttamaḥ —the best among the Vasūs (Bhīṣmadeva);  pūjayāmāsa —welcomed;  dharma-jñaḥ —one who knows religious principles;  deśa —place;  kāla —time;  vibhāga-vit —one who knows the adjustment of place and time.
TRANSLATION
Bhīṣmadeva, who was the best amongst the eight Vasūs, received and welcomed all the great and powerful rṣis who were assembled there, for he knew perfectly all the religious principles according to time and place.
PURPORT
Expert religionists know perfectly well how to adjust religious principles in terms of time and place. All the great  ācāryas  or religious preachers or reformers of the world executed their mission by adjustment of religious principles in terms of time and place. There are different climates and situations in different parts of the world, and if one has to discharge his duties to preach the message of the Lord, he must be expert in adjusting