וַיָּ֨שָׁב יִצְחָ֜ק וַיַּחְפֹּ֣ר ׀ אֶת־בְּאֵרֹ֣ת הַמַּ֗יִם אֲשֶׁ֤ר חָֽפְרוּ֙ בִּימֵי֙ אַבְרָהָ֣ם אָבִ֔יו וַיְסַתְּמ֣וּם פְּלִשְׁתִּ֔ים אַחֲרֵ֖י מ֣וֹת אַבְרָהָ֑ם וַיִּקְרָ֤א לָהֶן֙ שֵׁמ֔וֹת כַּשֵּׁמֹ֕ת אֲשֶׁר־קָרָ֥א לָהֶ֖ן אָבִֽיו׃
Isacco tornò a scavare i pozzi che (i suoi) avevano scavato in vita d’Abramo suo padre, i quali i Filistei avevano turati dopo la morte d’Abramo; ed impose loro gli stessi nomi che aveva loro imposto suo padre.
Rashi on Genesis
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 on Genesis
אשר קרא להן אביו, in order to prevent anyone in the future to challenge the ownership of the wells.
Radak on Genesis
וישב יצחק...אשר חפרו, the servants of his father.