Ibn Ezra on Leviticus 26:42

וזכרתי את בריתי. מושך עצמו ואחר עמו וכן הוא וזכרתי את בריתי את ברית יעקב כמו והנבואה עודד הנביא שהוא כמו והנבואה נבואת עודד הנביא ראשיכם שבטיכם שהוא ראשיכם ראשי שבטיכם ויאמר הגאון כי טעם להזכיר בתחלה יעקב בעבור היות שנותיו כלם בברית: THEN WILL I REMEMBER MY COVENANT. My covenant is to be read as if written twice. Then will I remember My covenant with Jacob¹³³Our verse literally reads, “Then will I remember My covenant Jacob.” Hence I.E.’s comment. is to be interpreted as if written, Then will I remember My covenant, My covenant with Jacob. Compare, even the prophesy, Oded the prophet¹³⁴Translated literally. (II Chron. 15:8), which is to be read as if written, even the prophesy, the prophesy of Oded the prophet; your heads, your tribes (Deut. 29:9), which is to be read as if written, your heads, the heads of your tribes. The Gaon says that the reason Scripture mentions Jacob first¹³⁵Scripture usually lists the patriarchs in order. It starts with Abraham and concludes with Jacob. However, here it starts with Jacob. Hence I.E.’s comment. is that all of his years were in the covenant.¹³⁶The covenant that God made with Abraham. See Gen. 17:1-14. Jacob was born after God entered into the covenant with Abraham. Thus Jacob spent his entire life under the covenant. This was not the case with Abraham. Isaac also was born under the covenant. However, Scripture did not start with him, for one cannot start a list from the middle.