General Information:

Isaiah continues to describe his vision.

The foundations of the thresholds shook at the voices of those who were crying out

"When the seraphim called out, their voices shook the doorways and their foundations"

This can be stated in active form. AT: "smoke filled the temple" or "smoke filled the palace" (See: rc://en/ta/man/translate/figs-activepassive)

This can be stated in active form. AT: "I am in great trouble! Terrible things will happen to me" (See: rc://en/ta/man/translate/figs-activepassive)

Here "lips" represent what a person speaks. And, people saying things that are unacceptable to God is spoken of as if their lips were physically unclean. (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-metaphor)

Yahweh, the ruler of the angel armies"

Here "eyes" represents the whole person. AT: "I have seen" (See: rc://en/ta/man/translate/figs-synecdoche)