Exodus 16:36

Now, an omer is the tenth part of an ephah, as the author adds by way of explanation, an ephah at that time measuring almost three and one-fourth pecks. This closes the account concerning the manna for the present. The entire story reminds us of the gracious providence of God, which takes care of all our needs and bids us not to worry about the morrow, Matthew 6:34. If we seek first the kingdom of God and His righteousness, then all the things which we need for this life will be added unto us.