וַיֹּ֣אמֶר יְהוֹשָׁפָ֗ט הַאֵ֨ין פֹּ֤ה נָבִיא֙ לַֽיהוָ֔ה וְנִדְרְשָׁ֥ה אֶת־יְהוָ֖ה מֵאוֹת֑וֹ וַ֠יַּעַן אֶחָ֞ד מֵעַבְדֵ֤י מֶֽלֶךְ־יִשְׂרָאֵל֙ וַיֹּ֔אמֶר פֹּ֚ה אֱלִישָׁ֣ע בֶּן־שָׁפָ֔ט אֲשֶׁר־יָ֥צַק מַ֖יִם עַל־יְדֵ֥י אֵלִיָּֽהוּ׃
約沙法說：«這裡沒有永恆者的先知嗎？我們可以藉著他求問永恆者。»以色列王的一個臣僕回答說：«這裡有沙法的兒子以利沙，就是從前倒水在以利亞手上的。»
Rashi
Who poured water on the hands of Eliyahu. On Mount Carmel,7See I Melochim 18:34 and Rashi there. and with his pouring, his fingers became like springs of water, until the ditch filled up, and it is [therefore] fitting for a miracle to be performed for us through him concerning water.8See Yalkot Shimoni 247:214.9Alternatively, this is an expression to indicate Elisha’s total devotion to Eliyahu to the extent that he even poured water on Eliyahu’s hands. From here we derive that those who serve Torah scholars are greater than those who only study the Torah. See Maseches Berachos 7b.