SB 1.9 - Bhīṣma welcomes the great souls
Bhīṣma received and welcomed all these great personalities, for he knew perfectly all the religious principles according to time and place. Since he could not rise, he worshipped them mentally and with words. All great ācāryas or reformers of the world executed their mission by adjustment of religious principles in terms of time and place. Bhīṣma was one of the 12 great authorities in preaching devotional service, and thus could receive and welcome all the powerful sages who had come from all parts of the universe. Though physically incapacitated, by the activities of his sound mind he could utter sweet words with hearty expressions to welcome the sages.