אל מקום המזבח אשר עשה שם בראשונה ויקרא שם אברם בשם ד’ (לך לך יג:ד)

When Avraham Avinu built the Mizbayech (altar) before heading to Mitzrayim, the pasuk says “‘ויבן שם מזבח לה” – without mentioning Avraham’s name.  However, when he came back from Mitzrayim ‘ויקרא שם אברם בשם ד– it did mention Avraham’s name since he became very wealthy and people heard about the great miracles that happened to him, and therefore his name was renowned; hence, the pasuk says ויקרא שם אברם.