Pausanias Description of Greece 2.16.5

[5] It was jealousy which caused the Argives to destroy Mycenae . For at the time of the Persian invasion the Argives made no move, but the Mycenaeans sent eighty men to Thermopylae who shared in the achievement of the Lacedaemonians. This eagerness for distinction brought ruin upon them by exasperating the Argives. There still remain, however, parts of the city wall, including the gate, upon which stand lions. These, too, are said to be the work of the Cyclopes, who made for Proetus the wall at Tiryns .

[5] It was envy that caused the Argives to destroy Mycenae. For at the time of the Persian invasion the Argives made-no-move [ hēsukhazein], but the Mycenaeans sent eighty men to Thermopylae who shared in the achievement [ ergon] of the Lacedaemonians. This act-of-eagerness-for-distinction [ philo-tīmēma] brought ruin upon them by aggravating the Argives. There still remain, however, parts of the enclosing-wall [ peribolos], including the gate [ pulē], on top of which stand lions. These [walls], too, are said to be the work [ erga] of the Cyclopes, who made for Proitos the [circumference-] wall [ teikhos] at Tiryns.