ייִדישער מחשבֿה אויף מלכים א 18:13

(1) The alchemist requires special materials to perform his operation, without which he cannot do anything. These materials are not found at all times and in all places. But for one who trusts in G-d, his sustenance is assured and can come through any means of all the means of the world, as written "[And He fed you with manna, which you knew not, neither did your fathers know]; That He might make known to you that man does not live by bread alone..." (Devarim 8:3). For at no time and in no place are the means of obtaining his livelihood withheld from him, as you know already from the story of Eliyahu and the ravens, or with the widow and the cakes and water (Melachim 17:9), or the story of Ovadia with the prophets, where he said "I hid among the prophets of G-d, 100 men, 50 in each cave, and I fed them bread and water" (Melachim 18:13) , and "Young lions suffer want and are hungry, but those who seek the L-ord lack no good" (Tehilim 34:11), and "Fear the L-ord, His holy ones; for there is no want to those who fear Him" (Tehilim 34:10).