Ambrose of Milan

Jacob set out and slept—evidence of tranquility of spirit—and saw angels of God ascending and descending. This means he foresaw Christ on earth; the band of angels was descending to Christ and ascending to him, so as to render service to their rightful master in loving servitude.

On Jacob and the Blessed Life, Book 2, Chapter 4, Section 16 ↗

Bede

Now when Jacob, wishing to rest in a certain place, put a stone under his head, he saw in his sleep a ladder standing upon the earth with its top touching heaven. [He saw] also angels of God ascending and descending on it and the Lord resting on the ladder saying to him, "I am the God of Abraham your father, and the God of Isaac." And rising in the morning and rendering praise to the Lord with due trepidation, he took the stone and set it up as a mark, pouring oil on it.The Lord made mention of this place and most clearly bore …

Homilies on the Gospels 1.17 ↗

Bonaventure

Since therefore one must first ascend before descending on the ladder of Jacob, let us place the first step of ascent at the bottom, setting this entire sensible world before us as a mirror, through which we may pass over to God, the supreme Artificer, so that we may be true Hebrews passing over from Egypt to the land promised to the Fathers, and also Christians passing over with Christ from this world to the Father, and also lovers of wisdom, who calls and says: Pass over to me, all you who desire me, and be filled from my …

Itinerarium Mentis in Deum, Chapter 1 ↗