Genesis 19:24 (LSB)
24 And Yahweh rained on Sodom and Gomorrah brimstone and fire from Yahweh out of heaven,
The Lord (Yahweh) rains fire and brimstone on Sodom and Gomorrah "from the Lord (Yahweh)". This speaks to the plurality within God.
In this verse, a noun (Yahweh) is repeated instead of using a pronoun. See other examples of this in Genesis 17:23, Exodus 16:7: 1 Kings 1:53, 8:1, 12:21, Ezekiel 11:24, where the subject is repeated in this way, yet clearly does not imply some kind of plurality within the subject.