Luke
Luke 1:45ESV·traditional attribution

And blessed is she who believed that there would be a fulfillment of what was spoken to her from the Lord.”

John Calvin Reformed @genevareformer

45. And blessed is she that believed It was by a hidden movement of the Spirit, as is evident from a former statement of Luke, that Elisabeth spoke. The same Spirit declares that Mary is blessed because she believed, and by commending Mary’s faith, informs us generally in what the true happiness of men consists.

Matthew Henry Presbyterian @wholebiblehenry

We have here an interview between the two happy mothers, Elisabeth and Mary: the angel, by intimating to Mary the favour bestowed on her cousin Elisabeth (Luk 1:36), gave occasion for it; and sometimes it may prove a better piece of service that we think to bring good people together, to compare notes. Here is, I. The visit which Mary made to Elisabeth.

Commenting on Luke 1:39-56

John Gill Reformed Baptist @doctorgill

And blessed is she that believed..... Meaning Mary, a woman, a very young woman, and who had had things very incredible to nature and reason told her; and yet she believed, without objecting thereto, or requiring a sign; tacitly referring to the unbelief of Zacharias, who was a man, a man in years, a priest by office; and yet had been very incredulous, in a...