Allah Ta'ala has mentioned the attributes who deserve and are the inheritors of Jannatul Firdaus. Some of their characteristics and attributes have been mentioned in the beginning verses of Surah Momineen.
There is a Hadith in Jame’ Tirmidhi that the Holy Prophet (Sallallahu alaihi wa sallam) said: 10 verses have been revealed to me and whoever fulfils those conditions will enter Jannah. Then He (Sallallahu alaihi wa sallam) recited the first 10 verses of Surah Momineen. (Jame’ Tirmidhi, Hadith No. 3472).
“Falah†i.e. success mentioned in the first verse of Surah Al-Momineen does not mean success of any 1 kind, but means success of both the worlds. A person with these 10 qualities will be blessed in this world and in the Aakhirah (hereafter) only that kind of person will be successful.
First quality
The first quality of those who deserve Jannah is “Iman,†which is the most basic requirement. About Iman, Mufti Sahab said that it means acknowledging all that has come from Allah Ta'ala through the Holy Prophet (Sallallahu alaihi wa sallam) with one’s heart.
A Momin (true believer) does not follow his/her own intellect, but is obedient to the Holy Quran and the Sunnah. His/her belief does not hang by the weak thread of incomprehensible or one’s own philosophies, but rests on what the Holy Prophet (Sallallahu alaihi wa sallam) told.
Iman of the Sahabah – Standard for the Ummah
Allah Ta'ala has declared the Iman of the Sahabah as the standard and touchstone for the whole Ummah.
The Holy Prophet (Sallallahu alaihi wa sallam) said: If anyone of you gives away in charity gold like the mountain of Uhud, even then he (or she) cannot get the reward the Sahabah get by giving away a small amount of barley. (Sahih Bukhari, Hadith No. 6652) and those Sahabah whose Iman is the standard for the whole Ummah describe their faith of the Holy Prophet (Sallallahu alaihi wa sallam):
O Prophet of Allah (Sallallahu alaihi wa sallam)! All of us cannot become even like one attribute of Yours. (Sahih Bukhari, Hadith No. 20)
Second quality
The second quality of those enter Jannah is that they offer Salaat with complete sincerity and devotion. This means that while offering Salaat their whole attention is in the Salaat only and they turn to Allah Ta'ala with their whole being and reflect and think about the recitations/prayers which they recite in the Salaat. Also, they should follow the external rules of Salaat as well.
The word “ Khushoo’ †is a very comprehensive word, which included the outward and the inward aspects of worship. It is given in Sahih Bukhari: You worship Allah Ta'ala as if you are seeing Him, even if you can’t do that, still pray with the same devotion, as He is seeing you. (Sahih Bukhari, Hadith No. 50)
Third quality
The third quality of those will enter Jannah is that they don’t pay attention to useless and ridiculous things.