תּלמוד אויף יחזקאל 1:28

And we teach regarding the Chashmal [in Ezekiel 1:28]? But wasn't there a child who learned regarding the Chashmal, and a fire came out and devoured him? The child is different, for his time had not come [to learn about the Chashmal].

(Mishnah:) Anyone who does not care about the honor of his Owner, it would have been better for him to not have entered the world. (Gemara:) What is this [referring to]? Rav Abba said, "This is one who stares at a rainbow." Rav Yosef said, "This is one who transgresses a sin in private." One who stares at a rainbow, as it is written, "As the appearance of the bow that is in the cloud in the day of rain, so was the appearance of the brightness round about. This was the appearance of the likeness of the glory of the LORD (Ezekiel 1:28)."

Rabbi Yehudah the son of Rabbi Nachmani, the translator of Reish Lakish, expounded: "All who stare at three things, his eyes are dimmed: At the rainbow, at the Nasi (prince), and at the priests. At the rainbow, as it is written, 'As the appearance of the bow that is in the cloud in the day of rain... this was the appearance of the likeness of the glory of the LORD.' At the Nasi, as it is written, 'And you shall put from your honor upon him (Numbers 27:2).' One who looks at the priests [his eyes would dim], at the time that the Temple was standing, for they would stand on their platform and bless Israel with the Tetragrammaton.