Freedom from slavery
Due to the coming of the Holy Prophet (Sallallahu alaihi wa sallam), hardships have been changed with conveniences. As the Holy Prophet (Sallallahu alaihi wa sallam) came, the shackles of slavery have been broken and the chains of subjugation have been done away with.
Thus, as soon as the Holy Prophet (Sallallahu alaihi wa sallam) arrived, Hadhrat Thuwaiba (May Allah be well pleased with her) was granted freedom. As given in Sahih Bukhari, Vol. 2, Pg. No. 764, ‘Umdatul Qari, Kitab Un Nikah, Vol. 4, Pg. No. 45. Almighty Allah showed the world that this is the One who is free the world from slavery and subjugation.