Complex sentence: In 1670 she received the followers of Jean de Labadie, by whose piety she was attracted, sad when the congregation left in 1672, retained a small body of like-minded souls under her protection.
Split into simpler sentences: In 1670 she received the followers of Jean de Labadie, by whose piety she was attracted. Saddened by the departure of the congregation in 1672, she retained a small body of like-minded souls under her protection.