בַּחֹ֨דֶשׁ הַשֵּׁנִ֜י בְּאַרְבָּעָ֨ה עָשָׂ֥ר י֛וֹם בֵּ֥ין הָעַרְבַּ֖יִם יַעֲשׂ֣וּ אֹת֑וֹ עַל־מַצּ֥וֹת וּמְרֹרִ֖ים יֹאכְלֻֽהוּ׃
Pesach Haggadah
He would wrap the matsa and marror and eat them together, in order to fulfill what is stated, (Numbers 9:11): "You should eat it upon matsot and marrorim."