The Ruling on having Sex before the first Phase of Removing the Ihram
Question:
Is it obligatory for someone who had sex before the first phase of removing the Ihram to repeat the Hajj, while knowing that his Hajj was a voluntary performance of Hajj?
Answer:
If he had sex before the first phase of removing the Ihram, his Hajj is corrupted. He must complete it and he must make up for it (i.e., make over) after that, even if it was a voluntary Hajj, as the Companions of the Prophet sallAllaahu `alayhi wa sallam ruled. He must also sacrifice a camel, which he slaughters and distributes among the poor people of Makkah Al-Mukarramah. And Allaah is the One from Whom help is sought.
Source:
Shaykh `Abdul-`Azeez Bin Baz
Fatawa Islamiyah vol.4, p.147, DARUSSALAM