Luke 12:26

So if you cannot do this very little thing, why should you worry about the rest?

Luke 12:29

So you must stop seeking what to eat and what to drink, and must stop being in suspense about these things.

1 Peter 5:7

Cast every worry you have upon Him, because He cares for you.

Treasury of Scripture Knowledge

Summary

If ye then be not able to do that thing which is least, why take ye thought for the rest?

Bible References

Why

Luke 12:29
So you must stop seeking what to eat and what to drink, and must stop being in suspense about these things.
1 Peter 5:7
Cast every worry you have upon Him, because He cares for you.