“Avoid oppression, because oppression will result in deep darkness on the Day of Ressurection.” [Recorded by Muslim and others]
The two spouses should be fair and just in dealing with each other.
They should avoid oppressing one another in any way.
They should not take unfair advantage of their rights, or abuse each other through their distinctive qualities.
Oppression has been prohibited by Allah (subhanahu wa ta’ala) even upon Himself! Abu Tharr(radiyallaahu anhu) reported that Allah’s Messenger (sallallaahu alaihi wasallam) said:
Allah says, “O My servants! I have indeed prohibited injustice upon myself and made it prohibited among you, so do not oppress one another.” [Recorded by Muslim]
Let not feelings of superiority and dominance creep into the heart of either of the two spouses, causing him or her to oppress the other spouse, thinking that he or she has accomplished thereby a well earned victory.
Let them both ponder over the above hadiths, and let them beware of a secret curse that may arise from the heavy heart of an oppressed soul.
Anas bin malik (radiyallaahu anhu) reported that Allah’s Messenger (sallallaahu alaihi wasallam) said:
“Avoid the oppressed’s supplication (against you), even if he was a kafir, because there is no barrier in its way (to Allah).” [Recorded by Ahmed, Abu Ya’la , and others. Verified to be hasan by al-Albani as sahih no 767 and sahih ul-jami no 119]
And oppression is never forgotten, and will never go unpunished.
Abu Hurayrah (radiyallaahu anhu) reported that Allah’s Messenger (sallallaahu alaihi wasallam) said:
“Whoever has oppressed his brother in regard to his honor or property should beg for his forgiveness today – before it will be taken from him on a day when there will be no dinars or dirhams: If he has good deeds, some of them will be taken to the amount of his oppression; and if he has no good deeds, some of his (oppressed) companion’s sins will be taken and loaded upon him.” [Recorded by al-Bukhari and Ahmed
Reference: The Fragile Vessels (Rights and obligations between the spouses in Islam)