On the first day of the Festival that fell on the Sabbath, all the people would bring their lulavim to the synagogue. On the morrow they would awaken early and come. Everyone would recognize his own [lulav] and take it, for the Sages said: A man cannot fulfill his obligation on the first day of Succos with a lulav belonging to his friend; but on the other days of Succos a man can fulfill his obligation with a lulav belonging to his friend.

R’ Yose says: If the first day of Succos fell on the Sabbath, and one forgot and carried the lulav out into the public domain, he is exempt —- for he carried it out with permission.