Midrash su I Re 18:3

(I Kings 18, 3) And Achab called Obadiah, who was the superintendent of the house. Now Obadiah feared the Lord greatly. What was their discussion? R. Isaac said: "Achab said to Obadiah: "Concerning Jacob, it is written (Gen. 30, 27) The Lord hath blessed me for thy sake, and concerning Joseph it is written (Ib. 39, 5) The Lord blessed the Egyptian's house for the sake of Joseph. I, however, keep thee in my house, yet I am not blessed for thy sake. Perhaps thou art not fearing God?" Thereupon a heavenly voice was heard, saying: "Obadiah fears the Lord greatly, but the house of Achab is not destined for blessings." Raba said: "What is said of Obadiah is of greater signifieanee than what is said of Abraliam, for about Abraham it is not written 'greatly,' and about Obadiah 'greatly' is added." R. Isaac said: Why did Obadiah merit to be rewarded with prophecy? Because he hid one hundred prophets in a cave, as it is written (I Kings, 8, 4) And it happened when Isabel cut off the prophets of the Lord that Obadiah took a hundred prophets, and hid them fifty in one cave, and provided them with bread and water." Why fifty?" R. Elazar said: "He learned this from Jacob, as it is said (Gen. 32, 9) Then the other band which is left may escape." R. Abahu, however, said: "Because the cave could not hold more than fifty."

If thou lend money to any of my people (Exod. 22:24). Scripture states elsewhere in reference to this verse: He that putteth not out his money on interest (Ps. 15:5). Come and observe that every wealthy man who gives charity to the needy and does not lend out his money on interest is considered to have fulfilled all the commandments, as it is said: He that doeth these things shall never be moved (ibid.). Who was one such person? Obadiah, the wealthy overseer of Ahab’s household, as it is said: And Ahab called Obadiah, who was over the household. Now Obadiah feared the Lord greatly (I Kings 18:3). He fed the prophets out of his own resources during that famine (which Elijah produced) and even borrowed money on interest from Joram the son of Ahab to do so. Obadiah fulfilled the verse He that putteth not out his money on interest, but concerning Joram who loaned money on interest, the Holy One, blessed be He, said: Until now he has survived, but Jehu will come and slay him, as it is written: He hath given forth upon interest, and hath taken increase; shall he then live? (Exod. 18:13). It is also written: And Jehu drew his bow with his full strength, and smote Joram between his arms, and the arrow went out at his heart, and he sunk down in his chariot (II Kings 9:24). This occurred because he had become hard of heart and sought interest. Thus the prophesy of Ezekiel was fulfilled: He hath given forth upon interest and hath taken increase; shall he then live? (Ezek. 18:13).