G3701–ὀπτασία–optasia

When he came out, he could not speak to them, and they perceived that he had seen a vision in the temple. He continued making signs to them, and remained mute.

ὀπτασίαν optasian “a vision”

and when they didn't find his body, they came saying that they had also seen a vision of angels, who said that he was alive.

ὀπτασίαν optasian “a vision”

"Therefore, King Agrippa, I was not disobedient to the heavenly vision,

ὀπτασίᾳ, optasia “vision,”

It is doubtless not profitable for me to boast. For I will come to visions and revelations of the Lord.

ὀπτασίας optasias “visions”