Тосефта к Дварим 29:14

כִּי֩ אֶת־אֲשֶׁ֨ר יֶשְׁנ֜וֹ פֹּ֗ה עִמָּ֙נוּ֙ עֹמֵ֣ד הַיּ֔וֹם לִפְנֵ֖י יְהוָ֣ה אֱלֹהֵ֑ינוּ וְאֵ֨ת אֲשֶׁ֥ר אֵינֶ֛נּוּ פֹּ֖ה עִמָּ֥נוּ הַיּֽוֹם׃

но с тем, кто стоит здесь с нами в этот день перед Господом, Богом нашим, а также с тем, кого нет здесь с нами в этот день—

Tosefta Sotah

They make him swear with the oath that is written in the Torah, as it is said (Gen. 24:3), "I will swear to you by the Lord, the God of the Heavens, and the God of the Earth." They say to him, "Know that we do not administer an oath to you based on a stipulation in your heart; rather, your oath is taken based on our understanding and on the understanding of the court" (Ned. 25a:2, Steinsaltz tr.). And thus we find that Moses imposed an oath on the Children of Israel in the wilderness of Moab. He said to them, "Not on a stipulation in your heart," as it is said (Deut. 29:14), "And not with you alone [do I make this covenant]."