Ever-burning

"Ye powers inviolate, ever-burning lights! / Ye ruthless swords and altars, which I fled, / Ye sacred fillets, that adorned my head!"

The ever-burning candle dedicated to prisoners of war gave a reddish glow to the entire space.

He had never heard of the Arc de Triomphe nor did he know that it was the tomb of France's Unknown Warrior, though his companions did try to explain the significance of “the ever-burning flame.”

The ever-burning lamp of the cross is sufficient for the darkest child of a dark world —in his darkest day and hour!