Minister of Islamic Affairs, Da'wah and Guidance Sheikh Saleh bin Abdulaziz Al Al-Sheikh here today delivered a lecture on sources of Islamic legislation and its impact on the unification of the nation. The lecture was part of the cultural activities accompanying the National Festival of Heritage and Culture (Janadriya 32). In the lecture, he affirmed that the Holy Quran and the Sunna are the source of the Islamic legislation that the Islamic Ummah is unanimous on.