And His saying: {...on the condition that you make between us and them a barrier (saddan)} (Al-Kahf: 94). He said: "It is Taqiya."

Yunus bin Zabyan narrated from Abu Abd Allah [Imam al-Sadiq] in the Book of Shadows (Kitab al-Azilla) that Allah revealed to Hibat Allah Seth (Shith), the son of Adam, that he should not fight Cain (Qabil) and that he should worship his Lord in secret. Thus, Dissimulation (Taqiya) proceeded until the Known Time.

Imam al-Sadiq (PBUH) said:

"Whoever employs the Outward (Zahir), Allah grants him both the Outward and the Inward (Batin) together. But whoever employs the Inward and abandons the Outward, Allah strips him of both the Inward and the Outward together."

With a chain of transmission from Muhammad bin Musa, from Muhammad bin Ja'far, from Ali bin al-Hussein, from Muhammad bin Sinan, who said: al-Sadiq—peace be from him—said:

"Allah only manifested among His creation so that His etiquette (Adab) might be adopted. Therefore, what we have practiced, you must practice; and what we have rejected, you must reject."

Further confirming the obligation of Dissimulation is what was reported in the book Al-Safi regarding the exegesis of Surah al-Baqarah from Our Master al-Sadiq—peace be from him—stating: