וַיָּ֨שָׁב יִצְחָ֜ק וַיַּחְפֹּ֣ר ׀ אֶת־בְּאֵרֹ֣ת הַמַּ֗יִם אֲשֶׁ֤ר חָֽפְרוּ֙ בִּימֵי֙ אַבְרָהָ֣ם אָבִ֔יו וַיְסַתְּמ֣וּם פְּלִשְׁתִּ֔ים אַחֲרֵ֖י מ֣וֹת אַבְרָהָ֑ם וַיִּקְרָ֤א לָהֶן֙ שֵׁמ֔וֹת כַּשֵּׁמֹ֕ת אֲשֶׁר־קָרָ֥א לָהֶ֖ן אָבִֽיו׃
以撒又重新挖出他父親亞伯拉罕在世的日子所挖的那些水井，就是亞伯拉罕死後非利士人塞住的；他仍照他父親所起的名字給這些井起名。
Rashi
וישב ויחפר AND ISAAC DIGGED AGAIN — those wells which they had dug in the days of his father Abraham and which the Philistines had stopped up before Isaac left Gerar he once again dug.
Rashbam
אשר קרא להן אביו, in order to prevent anyone in the future to challenge the ownership of the wells.