מַלֵּ֖א שְׁבֻ֣עַ זֹ֑את וְנִתְּנָ֨ה לְךָ֜ גַּם־אֶת־זֹ֗את בַּעֲבֹדָה֙ אֲשֶׁ֣ר תַּעֲבֹ֣ד עִמָּדִ֔י ע֖וֹד שֶֽׁבַע־שָׁנִ֥ים אֲחֵרֽוֹת׃
“Tapusin mo ang linggo ng piging ng isang ito, at ibibigay rin namin sa iyo pati ang isang iyon, kapalit ng paglilingkod na gagawin mo sa akin nang pitong taon pa.”
Kitzur Shulchan Arukh
It is forbidden to perform the marriage ceremonies of two brothers or of two sisters in the same day, because you may not join one festive event with another. Some [authorities] say that you may not perform both ceremonies even in the same week,17Taz 548:1—Rabbeinu Yehudah Hachassid. See Sha’ar Hatziyun 546:3 who rules against this opinion, for Rashal stated it is a printing error as it contradicts the Talmud that permits one to marry less than a week before Yom Tov. and they bring proof [of this from the marriage] of our father, Yaakov. For it is written, "Fulfill the week of this one."18Genesis 29:27.