וַיֹּאמֶר֮ נַעֲמָן֒ וָלֹ֕א יֻתַּן־נָ֣א לְעַבְדְּךָ֔ מַשָּׂ֥א צֶֽמֶד־פְּרָדִ֖ים אֲדָמָ֑ה כִּ֡י לֽוֹא־יַעֲשֶׂה֩ ע֨וֹד עַבְדְּךָ֜ עֹלָ֤ה וָזֶ֙בַח֙ לֵאלֹהִ֣ים אֲחֵרִ֔ים כִּ֖י אִם־לַיהוָֽה׃
Naaman sprach: Möchte doch deinem Diener gegeben werden Erde, die Last eines Maultiergespannes; denn dein Diener wird fortan keinen andern Göttern Ganzopfer und Mehlopfer opfern außer dem Herrn; [deshalb möchte ich einen Altar auf heiliger Erde errichten].
Sforno
עולה וזבחים לאלוקים. This was intended as a symbol of Yitro’s acceptance of the yoke of Heaven. A similar symbolic acceptance is found in Kings II 5,17 when the general Naaman undertakes never again to offer such sacrifices as עולה וזבחים to any deities other than the G’d in heaven.
Rashi
I will not [ask of you] if I still be alive. An expression of request, as in and if only [וָלאׁ] it will be given to your bondsman.'8II Melachim 5:17. It is not removed from its usual meaning, 'and will you not do with me good while I am still alive, and do with me the kindness of Adonoy before I die?' And what is the kindness? That you will not discontinue your kindness with my household. Regarding this, you will make a covenant with me in my lifetime.
Rashi
If only you had gone in their ways Heb. וְלֹא, if only you had gone in their ways and not committed abominations more than they. Likewise (II Kings 5:17): “Now if only (וָלֹֹא) your servant to be given.” Likewise (I Sam. 20:14): “And please, if (וְלֹא) I am still alive,” concerning Jonathan, et plut a in French, would that..., if only!