Reference for Zevachim 230:13
דבר זה אמר הקב"ה למשה ולא ידעו עד שמתו בני אהרן כיון שמתו בני אהרן אמר לו אהרן אחי לא מתו בניך אלא להקדיש שמו של הקב"ה כיון שידע אהרן שבניו ידועי מקום הן שתק וקבל שכר שנאמר (ויקרא י, ג) וידום אהרן
this the Holy One, blessed be He, said to Moses, but they did not know [its meaning] until the sons of Aaron died.<span class="x" onmousemove="('comment',' God intimated that when He would 'meet with the children of Israel', i.e., at the consecration of the Tabernacle, He would be sanctified through His honoured ones (the priests) , but they did not understand the allusion.');"><sup>17</sup></span> When the sons of Aaron died, he [Moses] said to him: 'Oh my brother! Thy sons died only that the glory of the Holy One, blessed be He, might be sanctified through them'.<span class="x" onmousemove="('comment',' This is what God had meant. - Emended text (Sh.M.) .');"><sup>18</sup></span>