Abdullah ibn Umar RadiAllahu Anhu reported that asulullah Sallallahu Alaihi Wa Sallam said:

“Three people will not enter paradise and Allah Ajja Wa Jallah will not look to them on the Day of Judgment:
(1) the one who is disobedient to his parents,
(2) the woman who imitates men and
(3) the ad-Dayooth (cuckold, weak man who feels no jealousy over his womenfolk)…”

Musnad Ahmad (2/134) No. 6180,
Musnad al-Bazzar (12/270) No. 6051,
al-Sunnan al-Kubra al-Nasa’i (2/63) No. 2354,
al-Mu’jam al-Awsat al-Tabarani (3/51) No. 2443,
Saheeh Al-Jaami’ As-Sagheer 3/74, hadith no. 3066

What does Dayooth means?

Rasulullah Sallallahu Alaihi Wa Sallam said
‘A Dayooth will not enter Jannah.’
The Sahabah asked, ‘Who is a Dayooth?’
Rasoolullah sallallahu alaihe wasallam said,
‘A man who does not care who visits his wife (i.e. men).’

And on the issue of Ghayrah, Ibn al-Qayyim, rahimahullaah, said,

“And the Dayyouth (the man with no jealousy over the women in his family) is the most vile of Allah’s creation, and Jannah is forbidden for him, (because of his lack of Ghayrah – jealousy).

Men who do not care about how their women behave and appear in front of other men and don’t enforce hijaab upon their wives or women-folk are called Dayyooth.
Being a Dayyooth is a major sin and a detailed description of this evil characteristic can be found in adh-Dhahabee’s book of Major Sins
(Kitaab ul-Kabaa’ir).

Image Courtesy: “Sunnah Style”