Chasidut for Psalms 105:9

אֲשֶׁ֣ר כָּ֭רַת אֶת־אַבְרָהָ֑ם וּשְׁב֖וּעָת֣וֹ לְיִשְׂחָֽק׃

[The covenant] which He made with Abraham, And His oath unto Isaac;