רבי יוחנן הסנדלר

Rabbi Yochanan HaSandlar was a tanna, identified in the sources as a student of Rabbi Akiva, in whose name he brings teachings (Berachot 22a). His name appears across both halachic Mishnah and the discussions of the Gemara.

One of his best-known positions concerns one who cooks on Shabbat. He rules that food cooked unintentionally may be eaten after Shabbat by others but not by the one who cooked it, while food cooked deliberately may never be eaten, neither by him nor by others (Chullin 15a, Bava Kamma 71a, Ketubot 34a). In the law of betrothal, he holds that one who betroths a woman conditioned on a future event that is not yet in being — such as after a conversion or after another’s death — has not effected a valid kiddushin (Kiddushin 63a). On the question of one who consecrates the work of his wife’s hands, he teaches that the surplus remains ordinary (chullin), against Rabbi Meir who holds it becomes hekdesh; Shmuel rules the halachah follows him, reflecting the principle that a person cannot consecrate something not yet in the world (Nedarim 85b, Ketubot 58b).

He also appears in matters of ritual purity, discussing the status of an oven and the laws of vessels in Masechet Kelim, and his words are preserved among the teachings of the Sages in Pirkei Avot.