New Testament

Matthew 6:25-34

25 “Therefore I tell you, do not worry about your life, what you will eat or drink, or about your body, what you will wear. Isn’t there more to life than food and more to the body than clothing? 26 Look at the birds in the sky: They do not sow, or reap, or gather into barns, yet your heavenly Father feeds them. Aren’t you more valuable than they are? 27 And which of you by worrying can add even one hour to his life? 28 Why do you worry about clothing? Think about how the flowers of the field grow; they do not work or spin. 29 Yet I tell you that not even Solomon in all his glory was clothed like one of these! 30 And if this is how God clothes the wild grass, which is here today and tomorrow is tossed into the fire to heat the oven, won’t he clothe you even more, you people of little faith? 31 So then, don’t worry saying, ‘What will we eat?’ or ‘What will we drink?’ or ‘What will we wear?’ 32 For the unconverted pursue these things, and your heavenly Father knows that you need them. 33 But above all pursue his kingdom and righteousness, and all these things will be given to you as well. 34 So then, do not worry about tomorrow, for tomorrow will worry about itself. Today has enough trouble of its own.

Rabbinic

Sotah 48b

The mishna states that from the time when the Second Temple was destroyed men of faith ceased. Rabbi Yitzḥak says: These are people who believe in the Holy One, Blessed be He, and place their trust in Him in all their ways. As it is taught in a baraita: Rabbi Eliezer the Great says that whoever has bread in his basket to eat today and says: What shall I eat tomorrow, meaning he does not know how he will acquire bread for tomorrow, he is nothing other than from those of little faith. One must trust in God to provide him with his sustenance.