Комментарий к Берешит 26:25

ויכרו שם עבדי יצחק באר, Yitzchok did not name this well until his servants had completed it and until after Avimelech had come to him from Gerar suing for peace, and the confirmed their agreement by swearing an oath to each other. At that point his servants came and told him that they had located a new source of water and he called it שבעה as a reminder of the oath that had been sworn on that occasion by both Yitzchok and Avimelech.

ויקרא בשם ה'...ויכרו שם עבדי יצחק באר—ואבימלך הלך אליו. After Yitzchok had roused himself to proclaim the name of the Lord publicly, his servants started digging a successful well without encountering opposition. Not only this, but Avimelech now came to him in order to make a treaty with him, and not to interfere with him anymore. [I wonder whether the word הלך “he walked on foot,” somewhat unusual for the mode a king travels is meant to convey to us that he humiliated himself. Ed.]

'ויבן...ויקרא בשם ה. Just as Avraham had been in the habit of doing.