Hind was the wife of Abu Sufyan, a chief of Makkah. In the early days of Islam she was against the prophet (pbuh) and the Muslims. She would do everything in her power to attack and hurt the Muslims.
She was so against Islam that she would even accompany the Makkan army to fight against the Muslims. She would beat drums and sing songs which encouraged the men to fight harder against the poor Muslims.
She hired Whashi, who was a master javelin thrower to track down Hamzah, the prophets uncle. She told him to kill Hamzah and in return she would free Whashi, who was a slave, and also make him very rich. When Whashi carried out this evil act, she went and cut off the ears and nose of Hamzah and made a necklace from it.
She had much bitterness and hatred inside her for Muhammad (pbuh) and the Muslims. She had spent most of her life in this evil state and everyone knew of her bad behaviour towards the Muslims.
When Muhammad (pbuh) returned to Makkah after many years, all of Makkah accepted the prophet into their city. They were terrified, especially Hind, that the prophet (pbuh) would take his revenge because of their cruelty in the past.
The prophet (pbuh) forgave all the Makkans and Hind began to see Muhammad (pbuh) in his true light. As she spent a little time with Muhammad (pbuh) she became influenced by his wonderful character and became a Muslim. This was after spending only a short time in prophet Muhammad's (pbuh) good company.