וּבְי֣וֹם הַבִּכּוּרִ֗ים בְּהַקְרִ֨יבְכֶ֜ם מִנְחָ֤ה חֲדָשָׁה֙ לַֽיהוָ֔ה בְּשָׁבֻעֹ֖תֵיכֶ֑ם מִֽקְרָא־קֹ֙דֶשׁ֙ יִהְיֶ֣ה לָכֶ֔ם כָּל־מְלֶ֥אכֶת עֲבֹדָ֖ה לֹ֥א תַעֲשֽׂוּ׃
E no Dia dos Primeiros Frutos, quando trouxerdes uma nova oferta de cereal a Hashem, nas vossas semanas, será uma santa convocação; nenhum trabalho servil fareis.
Mishneh Torah, Daily Offerings and Additional Offerings
If they only found two sheep – and if they were to offer them for today’s musaf there would not be enough for tomorrow’s tamid – both options are equally valid. If they offered them for today’s musaf, it is valid, and if they wanted to leave them for tomorrow’s tamid offerings, they could do so.