The evening of the fourteenth [of Nissan] we must search for the chametz by the light of a candle. Any place into which chametz is not brought does not require a search.  So why have the Sages said, “Two rows of a [wine] cellar [must be searched]?” [The Sages were referring to] a place into which chametz. is brought.  Beis Shammai say: Two rows over the entire front of the [wine] cellar [must be searched]; but Beis Hillel say: The two outer rows which are the uppermost.

From when do we recite the Shema in the morning? From when one can distinguish between techeiles and white. R’ Eliezer says: between techeiles and leek. And one must finish it by sunrise. R’ Yehoshua says: By three hours, for such is the way of princes, to rise by three hours. One who recites from then and onward does not lose; [he is] like a person reading from the Torah.