Sforno on Genesis 35:14/ספורנו על בראשית ל״ה:י״ד

1ויסך 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.