The Histories · 4.104

The Agathyrsians are the most luxurious of men and wear gold ornaments for the most part: also they have promiscuous intercourse with their women, in order that they may be brethren to one another and being all nearly related may not feel envy or malice one against another. In their other customs they have come to resemble the Thracians.

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
Source edition
Passage preview. Read in context for the complete text, notes and references.