Luke 1:45

⁴³ And why am I so honored, that the mother of my Lord should come to me?

⁴⁴ For as soon as the sound of your greeting reached my ears, the baby in my womb leaped for joy.

Blessed is she who has believed that the Lord’s word to her will be fulfilled.”

⁴⁶ Then Mary said: “My soul magnifies the Lord,

⁴⁷ and my spirit rejoices in God my Savior!

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: Blessed is she who has believed that the Lord’s word to her will be fulfilled.”
KJV: And blessed is she that believed: for there shall be a performance of those things which were told her from the Lord.
WEB: Blessed is she who believed, for there will be a fulfillment of the things which have been spoken to her from the Lord!”
ASV: And blessed [is] she that believed; for there shall be a fulfilment of the things which have been spoken to her from the Lord.
DARBY: And blessed [is] she that has believed, for there shall be a fulfilment of the things spoken to her from [the] Lord.
BLB: And blessed [is] the one having believed that there will be a completion to the things spoken to her from the Lord.”

ÅB: Og salig er hun som trodde; for fullbyrdes skal det som er sagt henne av Herren.
OTB: Velsignet er hun som trodde at Herren ville oppfylle sine løfter til henne!”
B1930: Og salig er hun som trodde; for fullbyrdes skal det som er sagt henne av Herren.

John 20:29
Jesus said to him, “Because you have seen Me, you have believed; blessed are those who have not seen and yet have believed.”
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John 11:40
Jesus replied, “Did I not tell you that if you believed, you would see the glory of God?”
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Luke 11:27–28
As Jesus was saying these things, a woman in the crowd raised her voice and said, “Blessed is the womb that bore You, and blessed are the breasts that nursed You!”
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Luke 1:20
And now you will be silent and unable to speak until the day this comes to pass, because you did not believe my words, which will be fulfilled at their proper time.”
Read in context
2 Chronicles 20:20
Early in the morning they got up and left for the Wilderness of Tekoa. As they set out, Jehoshaphat stood up and said, “Hear me, O people of Judah and Jerusalem. Believe in the LORD your God, and you will be upheld; believe in His prophets, and you will succeed.”
Read in context