Rashi on Exodus 2:20/רש"י על שמות ב׳:כ׳

1למה זה עזבתן — WHEREFORE HAVE YE LEFT [THE MAN]? — He recognised that he was of the offspring of Jacob because for him (Moses), as for Jacob, the water had risen in the well at his approach (Midrash Tanchuma, Shemot 11)

2ויאכל לחם THAT HE MAY EAT BREAD — perhaps he will marry one of you — just as you say, (Genesis 39:6) “except the bread which he did eat” (cf. Rashi on this verse, where the word “bread” is explained as a euphemism) (Midrash Tanchuma, Shemot 11).