Genesis 15:1, The Word of YHVH came. Yeshua the Messiah is the Word of Elohim and is Elohim’s spokesman or intermediary with men (John 1:1–14). This is the Bible’s first usage of this phrase.
Subsequently, the phrase “Word of YHVH” is found some 242 times in the Tanakh. Many of these times relate to the biblical prophets receiving prophetic revelation from the “Word of YHVH,” which was the preincarnate Yeshua. How these prophets received their revelation from the Word of YHVH isn’t always clear.
In the case of Abram in this passage, he received the word through a vision. In most cases, Scripture simply records that “the Word of Elohim came” to such and such a prophet. Whether it came through dreams, visions, audible voice, or direct visitation, the Scriptures usually don’t say.
Nowadays, in prophetic circles within the church, seldom do people speak authoritatively and announce that “the Word of YHVH came to me and here is what I was told….” Instead, phrases such as “I have a word from God for you,” or “God told me to tell you this” are used. This is not how it was done by the legitimate prophets of the Bible. They actually received direct revelation from the preincarnate Yeshua and who spoke dogmatically and authoritatively as such.