[If he said,] ‘‘I take upon myself [to bring pieces of] wood’’ — he may not bring less than two logs. ‘‘Frankincense’’ — he may not bring less than a kometz. There are five kematzin: [If] one said, ‘‘I take upon myself [to bring] frankincense’’ — he may not bring less than a kometz. One who donates a minchah-offering must bring with it a kometz of frankincense; one who offers up a kometz outside [the Temple Courtyard] is liable; and the two spoonfuls require two kematzin.