Mishnayos Kerisos Perek 3 Mishnah 2

If one unwittingly ate an olive-bulk of forbidden fat and then ate another olive-bulk of forbidden fat during one lapse of awareness, i.e., in a case where he did not discover in the interim that fat is forbidden, or that the food he is eating is forbidden fat, he is liable to bring only one sin offering. If one ate forbidden fat, and blood, and piggul, and notar in one lapse of awareness, he is liable to bring a sin offering for each and every one of them. This is a stringency that applies to one who eats several types of forbidden food and does not apply to one who eats one type of forbidden food. And a stringency that applies to one who eats one type of forbidden food and not to one who eats several types of forbidden food is that if one ate half an olive-bulk and then ate another half an olive-bulk during one lapse of awareness, in a case where they were both from one type of forbidden food, he is liable to bring a sin offering. If they were from two types, he is exempt, because he did not eat an olive-bulk of any specific forbidden food.

אָכַל חֵלֶב וְחֵלֶב בְּהֶעְלֵם אֶחָד, אֵינוֹ חַיָּב אֶלָּא חַטָּאת אֶחָת. אָכַל חֵלֶב וְדָם וְנוֹתָר וּפִגּוּל בְּהֶעְלֵם אֶחָד, חַיָּב עַל כָּל אֶחָד וְאֶחָד. זֶה חֹמֶר בְּמִינִין הַרְבֵּה מִמִּין אֶחָד. וְחֹמֶר בְּמִין אֶחָד מִמִּינִין הַרְבֵּה, שֶׁאִם אָכַל כַּחֲצִי זַיִת וְחָזַר וְאָכַל כַּחֲצִי זַיִת מִמִּין אֶחָד, חַיָּב. מִשְּׁנֵי מִינִין, פָּטוּר: