שֵׁ֣שֶׁת יָמִים֮ יֵעָשֶׂ֣ה מְלָאכָה֒ וּבַיּ֣וֹם הַשְּׁבִיעִ֗י שַׁבַּ֧ת שַׁבָּת֛וֹן קֹ֖דֶשׁ לַיהוָ֑ה כָּל־הָעֹשֶׂ֧ה מְלָאכָ֛ה בְּי֥וֹם הַשַּׁבָּ֖ת מ֥וֹת יוּמָֽת׃
六天要做工，但第七天是完全安息的安息日，是歸永恆者為聖的；凡在安息日做工的，必被處死。
Siddur Sefard
After the Shemoneh Esrei has been said, the entire congregation repeats וַיְכֻלּוּ , in testimony of our belief that God created heaven and earth. According to Halacha, when one is a witness, he must stand and declare his testimony aloud.