וְאֶת־בְּרִיתִ֖י אָקִ֣ים אֶת־יִצְחָ֑ק אֲשֶׁר֩ תֵּלֵ֨ד לְךָ֤ שָׂרָה֙ לַמּוֹעֵ֣ד הַזֶּ֔ה בַּשָּׁנָ֖ה הָאַחֶֽרֶת׃
Но Мой завет Я заключу с Исааком, которого Сарра родит тебе в это время в следующем году.'
Jerusalem Talmud Nedarim
HALAKHAH: Rebbi Yoḥanan bar Marya said, it is written: “On that day, the Eternal concluded a covenant with Abram as follows,” etc., up to “but my covenant I shall affirm with Isaac,” etc., thirteen covenants160In Gen. 17:2–21 the word “covenant” appears 12 times. Therefore, Gen. 15:18 is added to reach the lucky number 13, the number of God’s attributes of mercy (Ex. 34:6–7) even though it speaks of a prior covenant; cf. the preceding Note..