Related for Menachot 13:3
הֲרֵי עָלַי עֵצִים, לֹא יִפְחֹת מִשְּׁנֵי גְזִירִין. לְבוֹנָה, לֹא יִפְחֹת מִקֹּמֶץ. חֲמִשָּׁה קֳמָצִים הֵן, הָאוֹמֵר הֲרֵי עָלַי לְבוֹנָה, לֹא יִפְחֹת מִקֹּמֶץ. הַמִּתְנַדֵּב מִנְחָה, יָבִיא עִמָּהּ קֹמֶץ לְבוֹנָה. הַמַּעֲלֶה אֶת הַקֹּמֶץ בַּחוּץ, חַיָּב. וּשְׁנֵי בְזִיכִין טְעוּנִין שְׁנֵי קֳמָצִים:
"I take upon myself wood" - he may not bring less than two logs. "Frankincense" - he may not bring less than a handful. There are five [situation where the measure is] handfuls: one who says, "I take upon myself frankincense" - he may not bring less than a handful; if he vows a grain offering - he must bring with it a handful of frankincense; one who offers a handful outside the Temple is liable; the two bowls [placed on the table with the <i>Lechem Hapanim</i> [twelve, specially shaped unleavened loaves offered each Shabbat on the golden table in the Temple ]require two handfuls [in each].