There is a famous Rashi in Parashat Vayigash (46:29) where Rashi explains that Yaakov didn't cry on Yosef's shoulders because he was reciting Shema. He cryptically quotes this in the name of "Rabotenu," but I can't seem to find a chumash that brings the original source of Yaakov saying Shema. Anyone know of a source, perhaps in a Midrash somewhere?
Chumash Shai Lamoreh in Sharey Tziyon says it comes from Midrash Agada as well as Teshuvos Hageonim (Simon 45 Teshuva 38) in the name of Mar Rav Yehudai Gaon. He says to see also Mesechtes Derech Eretz Zuta Perek Aleph and Maharsha Chiddushey Aggados to Yoma 19b.
I belive the midrash is Breshit Rabba 99.