פּירוש אויף בראשית 26:28

ראו ראינו WE SAW PLAINLY (literally, seeing we have seen) — We saw it in the case of your father and we see it in the case of yourself (Genesis Rabbah 64:10).

ראה ראינו, “we have seen repeatedly;” the fact that you have succeeded twice where we have failed has convinced us that your G-d is on your side;” clearly your success is due to you personally, and not to the quality of the earth that you have either planted seeds in or dug wells in. We have noted that since you departed this earth has failed to be blessed. It is clearly your G-d Who is the cause and Who is with you.

תהי נא אלה, which is בינותינו, between your father and me should remain in force also between בינינו, ובינך, between you and me. This had been part of the condition of that pact that neither Avraham’s children nor grandchildren were allowed to renege on a promise he had made on their behalf. (21,23)

‘תהי נא אלה בינותינו וגו means LET THE OATH that has existed BETWEEN US since the days of your father CONTINUE NOW BETWEEN US AND YOU.