Commentary for Genesis 35:14

AND JACOB SET UP A PILLAR. Rabbi Abraham ibn Ezra explained it as meaning: “And Jacob had previously²⁰⁴See above, 28:18; also Ramban, ibid., Verse 17. set up a pillar, and now he poured out a drink-offering thereon, and poured oil thereon.” This is correct.

ויסך עליו נסך, he poured a libation of wine on it. Thereby he completed paying his vow in which he had vowed to make out of the stone which had served as his pillow a monument, meaning “a house of G’d.” (28,22). By anointing this monument he had, so to speak, laid the foundation of the house of G’d to be built there in the future. What he did here was similar to what David did in his time when he prepared the foundation for the Temple his son Solomon was to build after his death in accordance with what the angel had told him at the threshing ground of Arona the Jebusite.

ויצב, the reason why the Torah repeats once more “in the place where He had spoken to him,” is to tell us that Yaakov had come to realise that that place was singularly suitable for deserving people to receive prophetic insights. Even though Yaakov had already said on the original occasion that this place must be designated as a house of G’d, now that G’d’s promises to him had materialised, seeing that G’d had spoken to him in that very place this was even plainer.