Reference for Sanhedrin 101:5
אמר רבא הא מני ר"ש היא דאמר שריפה חמורה סד"א הואיל ואחמיר בהו רחמנא בכהני דרבי בהו מצות יתירות תידון בשריפה קא משמע לן
or aNathin,<span class="x" onmousemove="('comment',' The Nethinim (Nathin, pl. Nethinim) are regarded in the Talmud as descendants of the Gibeonites, who, having obtained immunity during the Conquest of Canaan by a ruse, were degraded by Joshua to the position of 'hewers of wood and drawers of water' (Yeb. 78b; Josh. IX, 19-23). Actually they are first heard of as returning to Palestine after the Babylonian Exile (Ezra II, 58, VII, 20; Nehem. III, 26, 31). They served under the Levites in the Temple (Ezra VII, 24). Though first mentioned only after the return from the exile, it is stated that they were appointed by David to serve the Levites; hence they must have been well known in Israel long before the Babylonian Exile, in spite of their late mention. In Talmudic times they were placed on a very low level, being forbidden to intermarry with freeborn Israelites. ');"><sup>5</sup></span>