Talmud for Chullin 11:2
וְכַמָּה הוּא מְרֻבֶּה. בֵּית שַׁמַּאי אוֹמְרִים, שְׁתֵּי רְחֵלוֹת, שֶׁנֶּאֱמַר (ישעיה ז), יְחַיֶּה אִישׁ עֶגְלַת בָּקָר וּשְׁתֵּי צֹאן. וּבֵית הִלֵּל אוֹמְרִים, חָמֵשׁ, שֶׁנֶּאֱמַר (שמואל א כה), חָמֵשׁ צֹאן עֲשׂוּיוֹת. רַבִּי דוֹסָא בֶּן הַרְכִּינָס אוֹמֵר, חָמֵשׁ רְחֵלוֹת גּוֹזְזוֹת מָנֶה מָנֶה וּפְרָס, חַיָּבוֹת בְּרֵאשִׁית הַגֵּז. וַחֲכָמִים אוֹמְרִים, חָמֵשׁ רְחֵלוֹת גּוֹזְזוֹת כָּל שֶׁהֵן. וְכַמָּה נוֹתְנִין לוֹ. מִשְׁקַל חָמֵשׁ סְלָעִים בִּיהוּדָה, שֶׁהֵן עֶשֶׂר סְלָעִים בַּגָּלִיל, מְלֻבָּן וְלֹא צוֹאִי, כְּדֵי לַעֲשׂוֹת מִמֶּנּוּ בֶגֶד קָטָן, שֶׁנֶּאֱמַר (דברים יח), תִּתֶּן לוֹ, שֶׁיְּהֵא בוֹ כְדֵי מַתָּנָה. לֹא הִסְפִּיק לִתְּנוֹ לוֹ עַד שֶׁצְּבָעוֹ, פָּטוּר. לִבְּנוֹ וְלֹא צְבָעוֹ, חַיָּב. הַלּוֹקֵחַ גֵּז צֹאנוֹ שֶׁל נָכְרִי, פָּטוּר מֵרֵאשִׁית הַגֵּז. הַלּוֹקֵחַ גֵּז צֹאנוֹ שֶׁל חֲבֵרוֹ, אִם שִׁיֵּר הַמּוֹכֵר, הַמּוֹכֵר חַיָּב. לֹא שִׁיֵּר, הַלּוֹקֵחַ חַיָּב. הָיוּ לוֹ שְׁנֵי מִינִים, שְׁחוּפוֹת וּלְבָנוֹת, מָכַר לוֹ שְׁחוּפוֹת אֲבָל לֹא לְבָנוֹת, זְכָרִים אֲבָל לֹא נְקֵבוֹת, זֶה נוֹתֵן לְעַצְמוֹ וְזֶה נוֹתֵן לְעַצְמוֹ:
What is considered "a number"? According to Beth Shammai, two sheep come under this category, since we find it written (Isaiah 7:21), "A man shall nourish a young cow and two sheep;" but Beth Hillel say, "[At least] five, for it is also written (Samuel I 25:18), 'Five sheep ready dressed.'" R. Dosa ben Arkinar saith, "When the fleece of each of the five sheep amounts to the [minimum] weight of one half maneh, the obligation of paying the firstling of the wool is incurred;" but the sages hold, "That it is incurred as soon as five sheep are shorn, whatever the weight of their fleece may be." What quantity must be given to the priest? The weight of five selahim, in Judea, which are equal to ten selahim in Galilee, of white [i.e. clean], but not of dirty wool, and in sufficient quantity as to make therewith the smallest [sacerdotal] garment, for it is said (Deut. 18:5), "Shalt thou give unto him," viz. a sufficient gift [which has some value]. If he could not give it to the priest before it was dyed, he is not bound to give it at all. If the owner of the wool had only bleached, but not yet dyed it, he is bound to give it. If any person buys from a heathen the fleece of sheep [yet to be shorn], he is not bound to pay to the priest the firstling of the fleece. If one Israelite bought it of another, if the seller reserved some of the wool to himself, he is bound to pay this oblation, but if he sold it without such reservation, this obligation is incumbent on the buyer. If he [the seller] had two kinds of wool, gray and white, if he sold the gray but not the white wool, or of rams but not of ewes, each party must pay the oblation to the priest.