Midrasch zu Könige II 2:9

Raba said to Rabba b. Mari: "It is written (I Kings 1, 47) May God make the name of Solomon more famous than thy name, and make his throne greater than thy throne." Is this the usual way of speaking to a king? And he answered: "It is not to be taken literally; they meant to say similar to thy name, for if you would not say so, how is to be understood (Jul. 5. 24) Blessed above women shall Joel be, the wife of Heber the Kenite, above women in the tent shall she be blessed? Who is meant by women in the tent, if not Sarah, Rebeka, Rachel, and Leah? Now, is this prayer to mean that Joel shall be more blessed than they? But it means, similar to them; so also here it means similar to them." This, however, disagrees with the opinion of R. Jose b. Choni; for R. Jose b. Choni said that of every one a man is jealous except of his own son and disciple. Of his son, as we see from the above-cited verse concerning Solomon. And of his disciple, if you wish you may infer it from (II Kings 2, 9) And Elisha said, Let there be, I pray thee, a double portion of thy spirit upon me, and if you wish you may infer it from (Num. 27, 23) And he laid his hands (both) upon him, though he was commanded (Ib. ib. 18) Thou shalt lay thy hand (one) upon him.

Furthermore, when a person welcomes another into his home he must treat the visitor with greater respect than he accords his own father and mother. You find that when Elijah said to Elisha: Ask what I shall do for thee before I am taken from thee (II Kings 2:9), Elisha replied: Let a double portion of thy spirit be upon me. Thereupon Elijah responded: Thou hast asked a difficult thing; nevertheless, if thou shouldst see me when I am taken from thee, it shall be so unto thee; but if not, it shall not be so. And it came to pass, as they still went on and talked, that behold, there appeared a chariot of fire, and hordes of fire, which parted them both asunder (ibid., vv. 10–11). Surely it was Elisha’s duty to visit his father and mother first in order to revive them, but instead he revived the son of his host, the Shunammite’s son. Similarly Elijah should have revived his father, instead of reviving the son of (the widow of) Zarephath, but he risked his life in appreciation for her hospitality.