Hazrat Abdullaah bin Amr who is famous companion of Prophet Muhammad says:
“When Makkah was conquered, Prophet Muhammad announced that everyone should lay down their arms except for the people of the Banu Khuzaa’ah tribe, who were allowed to use their weapons against the people of the Banu Bakr tribe because they were at risk from them.
This permission remained until Prophet Muhammad had performed the Asr salaah (namaz), after which he instructed them to also lay down their arms.
The following day however, a man from the Banu Khuzaa’ah tribe met someone from the Banu Bakr tribe in Muzdalifah and killed him.
When the news reached Prophet Muhammad (pbuh), I saw him leaning against the Kabaa as he stood up and addressed the people saying,
“Verily Allah’s greatest enemy is the person who kills in the Haram, who kills someone who was no threat to his life or who kills in revenge for something done during the Period of Ignorance.”
A man then stood up and claimed that a particular child was his. Prophet Muhammad’s response to this was:
“One cannot randomly lay claim to a child in Islam because the practices of the Period of Ignorance have all come to an end.
A child belongs to the biological father and the one who commits adultery shall have that which is most blunt.”
‘What is that which is most blunt?’ the Sahabah (companions of Prophet Muhammad) asked.
Prophet Muhammad replied: ‘Stones (the person will be stoned to death).’
Prophet Muhammad then proceeded to say:
“No salaah can be performed after the Fajr salaah until sunrise and no salaah after the Asr salaah until sunset.
A woman can also not be married (at the same time) to the person married to either her paternal or maternal aunt.”1
1. Tabraani, reporting from reliable sources as confirmed by Haythami (Vo1.6, Pg.178)