Matt 4:4
But he answered, “It is written, “‘Man shall not live by bread alone, but by every word that comes from the mouth of God.’”

Word = rhéma to speak") – a spoken word, made "by the living voice" , for the Lord speaking His dynamic, living word in a believer to inbirth faith ("His inwrought persuasion")

Ro 10:17: "So faith proceeds from (spiritual) hearing; moreover this hearing (is consummated) through a rhēma-word (4487 /rhḗma) from Christ"

2 Cor 12:4 was caught up into Paradise and heard inexpressible words, which a man is not permitted to speak.

Deuteronomy 8:3
He humbled you, and in your hunger, He gave you manna to eat, which neither you nor your fathers had known, so that you might understand that man does not live on bread alone, but on every word that comes from the mouth of the LORD.

Motsa = a place or act of going forth, issue, export, source, spring

Johh 7:38 Whoever believes in me, as the Scripture has said, ‘Out of his heart will flow rivers of living water.’”