According to foundational Islamic principles, the concept of 'Lawful' (Halal - حلال) refers to anything that is permitted or allowed by Allah in the Quran and the authentic teachings of the Prophet Muhammad. Classical scholars like Al-Qurtubi and Al-Tabari affirm a core principle of Islamic jurisprudence: everything is considered lawful by default unless explicitly prohibited. This establishes a vast sphere of permissibility in a Muslim's life, from food and drink to financial transactions and daily conduct. The Quran, in verses such as 2:168, frequently pairs the term Halal with 'Tayyib' (good, pure, wholesome), guiding believers to not only seek what is permitted but also what is of high quality and ethical nature. The authority to legislate what is lawful and unlawful rests solely with Allah, and to prohibit what He has permitted is a serious transgression. This comprehensive framework governs all aspects of life, ensuring that a Muslim's choices are aligned with divine guidance, ethical principles, and spiritual well-being.