Human beings are members of a whole,
In creation of one essence and soul.
If one member is afflicted with pain,
Other members uneasy will remain.
If you have no sympathy for human pain,
The name of human you cannot retain.
Saadi
Who was Saadi?
Abū-Muhammad Muslih al-Dīn bin Abdallāh Shīrāzī, better known by his pen name Saadi, also known as Saadi of Shiraz, was a major Persian poet and prose writer of the medieval period. He is recognized for the quality of his writings and for the depth of his social and moral thoughts
Read more:
https://en.wikipedia.org/wiki/Saadi_Shirazi
An alternative translation and more information
https://en.wikiquote.org/wiki/Saadi#:~:text=Human%20beings%20are%20members%20of,Other%20members%20uneasy%20will%20remain.