Genesis 29:12

כי אחי אביה הוא HE WAS HER FATHER’S BROTHER — near kin to her father, as (Genesis 13:8) “for we are men, brothers (אחים)” (i. e. near kin). A Midrashic explanation is that he meant: if he (Laban) intends to practice deceit upon me then I am his brother (a match for him) in deception; if, however, he is an honest man then I, too, am the son of his sister, the pious Rebekah (Genesis Rabbah 70:13). ותגד לאביה AND SHE TOLD HER FATHER, because her mother was dead and she had no one to tell except him (Bereishit Rabbah 70:13).

And Ya῾aqov told Raĥel that he was her father’s brother, and that he was Rivqa’s son: and she ran and told her father.

וַיַּגֵּ֨ד יַעֲקֹ֜ב לְרָחֵ֗ל כִּ֣י אֲחִ֤י אָבִ֙יהָ֙ ה֔וּא וְכִ֥י בֶן־רִבְקָ֖ה ה֑וּא וַתָּ֖רׇץ וַתַּגֵּ֥ד לְאָבִֽיהָ׃