Rashi on Exodus 32:13/רש"י על שמות ל״ב:י״ג

1זכור לאברהם (lit., remember for Abraham) — If they have transgressed the Ten Commandments, their father Abraham was tried by ten trials and has not yet received his reward for them. Give it to him now — remember for him this merit — and let the ten trials he successfully withstood countervail the infringement of the Ten Commandments (Midrash Tanchuma, Ki Tisa 24; Shemot Rabbah 44:4).

2לאברהם ליצחק ולישראל REMEMBER FOR ABRAHAM, FOR ISAAC, AND FOR ISRAEL — If they are to be punished with death by burning, remember for Abraham his merit that he gave himself over to be burnt for Your sake (for the sanctification of the Divine Name) in Ur (in the fire) of the Chaldees; if with death by the sword, remember for Isaac the merit that he stretched forth his neck to the knife on the occasion of the “Binding”. If by exile, remember for Jacob the merit that he went into exile to Haran (leaving the paternal roof in order to fulfil his father’s command). If, however, they cannot be saved by their ancestors merit what is the good of You saying to me, “and I will make of thee a great nation”? — if a chair with three legs (the merits of the three patriarchs) cannot stand before You in the moment of Your wrath, how much the less a chair with only one leg (the merits of myself alone) (Berakhot 32a).

3אשר נשבעת להם בך TO WHOM THOU SWAREST BY THINE OWN SELF — Thou didst not swear to them by a thing which is perishable — neither by the heavens nor by the earth, nor by the mountains, nor by the hills — but by Thy very Self, Who endurest forever and Whose oath endures for ever. For it is stated that God said to Abraham, (Genesis 22:16, 17) “By Myself have I sworn saith the Lord … [I will greatly multiply thy seed]”; to Isaac it was said, (Genesis 26:3, 4) “and I will perform the oath which I sware by Myself unto Abraham thy father … [and I will multiply thy seed]”; and to Jacob it was said, (Genesis 35:11) “I am God Almighty, be fruitful and multiply”; thus to him also God swore by Himself — by God Almighty (Shemot Rabbah 44:23).