Tacitus reports, that amongst certain barbarian kings their manner was… — Essays
SAPIR 861
Tacitus reports, that amongst certain barbarian kings their manner was, when they would make a firm obligation, to join their right hands close to one another, and intertwist their thumbs; and when, by force of straining the blood, it appeared in the ends, they lightly pricked them with some sharp instrument, and mutually sucked them.
Open Scriptures Hebrew Bible (WLC), CC BY 4.0