Are there any verses in the Old Testament or in the New testament about not worrying?

I know Matthew 6:33 says if you pursue a life of Godliness and Friendliness that God will provide for all your needs and interests, whether physical or emotional or biological. I'm not sure if this applies to marriage and children, cause some might say those are interests and not needs, since you won't die if you don't get married or have children.

I wonder if this is said or paraphrased in the Old Testament as well or in other parts of the New Testament.

What are your thoughts?

Are there any verses in the Old Testament or in the New testament about not worrying?
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