"each day's ration in its day": for the day and the morrow, e.g., on Friday, for Friday and Sabbath. R. Eliezer Hamodai says: So that one not gather for the day and the morrow, e.g., on Friday for Sabbath. "each day's ration in its day": He who created the day created its sustenance—whence R. Eliezer Hamodai was wont to say: Whoever has what to eat today and says "What will I eat tomorrow?" is lacking in faith. (Ibid. 4) "so that I may try them, whether or not they will walk in My law": From here R. Shimon b. Yochai was wont to say: Torah was given to be expounded only by the eaters of manna, as with one who sits and expounds without knowing whence he will eat and drink and whence he will clothe and cover himself. Torah was given to be expounded only by the eaters of manna, and, second to them, the eaters of terumah (i.e., Cohanim).