Who said "An ever-living fire, flaring up and dying down in measure."?

Heraclitus (c. 535–475 BC). Source: Fragment B30 (Diels-Kranz).

What is the original Greek?

πῦρ ἀείζωον ἁπτόμενον μέτρα καὶ ἀποσβεννύμενον μέτρα. Translated from the original Greek by Spartan Surfers.

An ever-living fire, flaring up and dying down in measure.

Heraclitus, Fragment B30 (Diels-Kranz)

The source

"An ever-living fire, flaring up and dying down in measure." Heraclitus said it in Fragment B30 (Diels-Kranz). Translated from the original Greek by Spartan Surfers.

"πῦρ ἀείζωον ἁπτόμενον μέτρα καὶ ἀποσβεννύμενον μέτρα."

Original Greek, Fragment B30 (Diels-Kranz). Greek: Diels-Kranz fragment text via el.wikisource.

Who said it

Heraclitus (c. 535–475 BC). Philosopher of Ephesus who taught that everything flows. Only fragments of his book survive.

Questions

Who said "An ever-living fire, flaring up and dying down in measure."?: Heraclitus (c. 535–475 BC). Source: Fragment B30 (Diels-Kranz).
What is the original Greek?: πῦρ ἀείζωον ἁπτόμενον μέτρα καὶ ἀποσβεννύμενον μέτρα. Translated from the original Greek by Spartan Surfers.