Hashem sustained the Bnei Yisroel in the form of Manna. The Manna did not fall during the day but rather in the middle of the night as they slept.
The lesson is that our livelihood is not necessarily dependent on our efforts. If it is the will of Hashem we will get what we need even in our sleep! ~ R’ Bachya
Today, the Tuesday of Parshas Beshalach, there is a well known segula for parnasah – say Parshas HaMon “shnayim mikra v’echad targum” (2 times the pasuk and 1 time the Targum Unkelos). Here is a link to the text http://www.tefillos.com/parshas_hamon.asp
Here is a another link with the interlinear translation but without Targum Unkelos – https://artscroll.files.wordpress.com/2009/01/the-chapter-of-manna.pdf