Al-Kafi, vol. 2, p. 79
Imam Baqir [a] said: "No worship with Allah is worthier than the purity of one's stomach and privity part (from lust)."
Al-Kafi, vol. 2, p. 80
The Holy Prophet [s] said: "The person for whom lust and vice is readily available but he avoids them for the fear of Allah, Almighty and Glorious, He will bar the Fire for him and ensure him against the Great Fear...."
The Holy Prophet [s] said: "He who is guarded against the vices of his stomach, tongue, and privy parts, is surely safeguarded from all sins."
Imam Amir ul Mu'mineen Ali [a] said: "Remember, (when committing sin), that pleasures are fleeting while the consequences remain.
Nahjul Balagha, p. 553
The Holy Prophet [s] said: "He who kisses a lad lustily, Allah, Almighty and Glorious, will bridle him with a reign of Fire."
Al-Kafi, vol. 5, p. 548
Imam Baqir [a] said: "What a struggle is better than for the piety of stomach and privity parts."
AI-Kafi, vol. 2, p. 79