Septuagint
An ancient tradition says that 70 Jewish scholars were in different rooms when they translated the Torah from Hebrew into Greek, yet they all produced exactly the same text. People thought this was a miracle. The Latin language word for "70" is septuaginta, and the word "Septuagint" comes from that. Another way to write "70" is "LXX" which is why writers sometimes use that as a short name for Septuagint.