Musar for Avodah Zarah 38:19

They have also said (Avodah Zarah 19b): "Whoever occupies himself with Torah, his possessions prosper," "Whoever occupies himself with Torah, the Holy One Blessed be He takes care of his needs."

And also in this world, his affairs will prosper, as Chazal have said (Avodah Zarah 19b): "Whoever occupies himself with Torah, his affairs prosper," as it is written (Psalms 1:2-3): 'but in the Torah of the L-rd is his desire,… and all that he does shall prosper.'"