Kommentar zu Schemuel II 20:26

Eiroh the Yoiri. Yonoson translated: "Eiroh who gives forth light from Tekuah." And so is he referred to in this book Eiroh ben Eikash of Tekuah. He was called Yoiri because it is taught in Menochos,¹⁶Menochos 85b. "Tekuah was first in [olive] oil," because olive oil was prevalent there from which candles are lit [in the Beis Mikdosh].

Was a Kokein for Dovid. He [Dovid] would give him [Eiroh] all his Kehunah gifts, that is what our Rabbis explained.¹⁷Eiruvin 63a. The simple explanation of the verse is that he [Dovid] made him [Eiroh] an officer and a judge.