BT Ber 43b(50) :ולא אמרן אלא דלא קבע ליה עידנא אבל קבע ליה עידנא אמרי לעידניה קא אזיל‏ : we only say (that) when he did not set a time for it [i.e. his study], but (if ) he had set a time for it, (people) say: "He is going to his (study) time"
See the entire entry for ˁeddān, ˁeddānā n.m. set time

BT Ber 43b(50) :אבל קבע ליה עידנא אמרי לעידניה קא אזיל‏ : if he set a fixed time for study then they say he is going to his study time
See the entire entry for ˁeddān, ˁeddānā n.m. set time