Final answer:
The most important group of scribes associated with the Old Testament is the Levites, who were responsible for religious duties and the preservation of sacred texts in ancient Judaism.
Step-by-step explanation:
The most important groups of scribes connected with the Old Testament is the Levites. The Levites were members of the tribe of Levi, one of the twelve tribes of Israel, and they held special religious duties in ancient Judaism, particularly in relation to the Temple and scribes roles. Different Jewish groups existed, such as the Sadducees, Pharisees, Essenes, and Zealots, but it was the Levites who were particularly known for their connection to religious rituals and texts. For example, during King Josiah's rule, the Levitical priests played a key role in religious reforms, including the exclusive worship of Yahweh and the compilation of sacred writings that became part of the Hebrew Bible.