Hadith.4291 - Imam (as) said: "Any oath that is not intended for the sake of Allah (swt), the Almighty and Glorious, is of no consequence, whether it pertains to divorce or emancipation."
Man Lā Yaḥḍuruh al-Faqīh #299Hadith.3441 - Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as):
"There is no valid emancipation except that which is done sincerely for...
Man Lā Yaḥḍuruh al-Faqīh #3I asked Abu Abdullah (as), about a man who frees another man as an expiation for breaking an oath or for zihar (a prohibited declaration...