Muhammad Ibn Sa‘d in Al-Tabaqat Al-Kabir, Vol10, Pg244 says:
The slave-girl Bint Amr Ibn Mo’ammal, one of the early converts to Islam in Makkah was tortured in the way of
Allah (swt). And Umar Ibn Al-Khattab before his conversion was the one who tortured her to force her
to leave Islam, so he hit her until he got tired, and said to her: "By God, I did not stop hitting you
unless I got tired!" Whereupon she said: "Your God will do the same to you!"
Alkarbala