法苑珠林 4.81

4.81

孝經周天七。衡六間曰。周天有七衡。而六間者。相去萬九千八百三十三里三分里之一合十一萬九千里。從內衡以至中衡。從中衡以至外衡。各五萬九千五百里。

The Seven Balances and Six Intervals of the Heaven's Circuit in the Classic of Filial Piety says: 'The heaven's circuit has seven balances and six intervals, separated from one another by 19,833 and one-third li, together making 119,000 li. From the inner balance to the middle balance, and from the middle balance to the outer balance, each is 59,500 li.'