Related for Beitzah 3:6
אֵין נִמְנִין עַל הַבְּהֵמָה לְכַתְּחִלָּה בְּיוֹם טוֹב, אֲבָל נִמְנִין עָלֶיהָ מֵעֶרֶב יוֹם טוֹב וְשׁוֹחֲטִין וּמְחַלְּקִין בֵּינֵיהֶן. רַבִּי יְהוּדָה אוֹמֵר, שׁוֹקֵל אָדָם בָּשָׂר כְּנֶגֶד הַכְּלִי אוֹ כְנֶגֶד הַקּוֹפִיץ. וַחֲכָמִים אוֹמְרִים, אֵין מַשְׁגִּיחִין בְּכַף מֹאזְנַיִם כָּל עִקָּר:
It is forbidden "to be counted" for (the purchase of) a beast ab initio on yom tov. [Monies are not stipulated, e.g., two or three men are not permitted to say: We will buy this beast for three zuz, a zuz for each.] But it is permitted to do so on yom tov eve, and they slaughter and divide among themselves (on yom tov) [in halves, thirds, and quarters, without mentioning the monies they had stipulated.] R. Yehudah says: It is permitted to weigh meat against a vessel or against a hatchet. [Even though it is forbidden to weigh by the pound, this being a mundane activity, it is permitted to weigh against a vessel or against a hatchet and so see the next day how much they weigh.] And the sages say: A scale may not be looked at, at all. [It is forbidden to put meat on the balance even to protect it against mice. The halachah is in accordance with the sages.]