Ryan Chiang McCarthy has published a translation of the 13th c. CE text Xinjing 心经. As he explains the text was:
…compiled by the Southern Song Dynasty politician and scholar Zhen Dexiu (1178-1235, art name Xishan). The Xinjing is an anthology of selected texts, from ancient classics such as the Yijing, the Liji, and the Mengzi, accompanied by comments by the Cheng brothers, Zhu Xi, and other eminent scholars, mostly of the Song period. Its theme, as the title suggests, is the matter of cultivating the heart, or mind.
Please see here. Congratulations, Ryan!