אִסְפוּ־עָ֞ם קַדְּשׁ֤וּ קָהָל֙ קִבְצ֣וּ זְקֵנִ֔ים אִסְפוּ֙ עֽוֹלָלִ֔ים וְיֹנְקֵ֖י שָׁדָ֑יִם יֵצֵ֤א חָתָן֙ מֵֽחֶדְר֔וֹ וְכַלָּ֖ה מֵחֻפָּתָֽהּ׃
백성을 모아 그 회를 거룩케 하고 장로를 모으며 소아와 젖먹는 자를 모으며 신랑을 그 방에서 나오게 하며 신부도 그 골방에서 나오게 하고
Mekhilta DeRabbi Yishmael
R. Yossi says (Psalms 8:3) "From the mouths of olelim and yonkim You have founded strength. "olelim" — infants in their mothers' womb, as in (Iyyov 3:16) "Why was I not like a buried stillbirth, like olelim who never saw the light"? "yonkim" — those who seek their mothers' breasts, as in (Joel 2:16) "Gather olelim and suckers ("yonkei") of the breasts."
Mekhilta DeRabbi Yishmael
Rebbi says: "Olelim are infants outside (their mothers' womb), viz. (Jeremiah 9:20) "to cut off the olel outside," and (Eichah 4:4) "Olelim begged for bread. "Yonkim" are those at their mother's breasts, viz.: "and suckers ("yonkei") of the breasts." These and those (at the splitting of the sea) opened their mouths and chanted song before the L–rd.
Midrash Tanchuma
R. Yosé the Galilean explained: Out of the mouths of babes and sucklings hast Thou founded strength (Ps. 8:3). Babes are those still in their mother’s wombs, as is said: Or as a hidden untimely birth I had not been; as babes that never saw life (Job 3:16). Sucklings are those who suckle at their mother’s breasts, as is said: Gather the children and those that suck the breasts (Joel 2:16). Rabbi maintained: Babes refers to children out on the street, as it is said: To cut off the children from the street (Jer. 9:20). Likewise it says: The young children ask bread (Lam. 4:4). All opened their mouths and sang the song unto the Lord. R. Meir declared: Even the embryos in their mother’s wombs sang the song, as it is said: Bless ye God in full assemblies, even the Lord, ye that are from the fountain of Israel (Ps. 68:27). Even the angels sang the song, as it is said: O Lord our Lord, how glorious is Thy name in all the earth! Whose majesty is rehearsed above the heavens (ibid. 8:2).