What is the compact rhetorical claim in “wa-lakum fī l-qiṣāṣi ḥayāh”?

Musāwāt and Ījāz al-Qaṣr: Proportionate Wording and the Rhetoric of Qiṣāṣ

• Just retribution serves the preservation of lives
• Qiṣāṣ is the mandatory penalty for every offence
• Life and qiṣāṣ are semantically unrelated
• Every individual must be killed under qiṣāṣ