Isaiah 49:12, a people very remote from the Holy Land, towards the east or south; generally believed to mean the Chinese, who have been known to Western Asia from early times, and are called by the Arabs Sin, and by the Syrians Tsini.
These dictionary topics are from American Tract Society Bible Dictionary published in 1859. Public Domain, copy freely.
Rand, W. W. "Entry for 'SINIM'". "American Tract Society Bible Dictionary".