It has been narrated on the authority of Abu Sa'id Khudri that the Messenger of Allah (ﷺ) said (to him): Abu Sa'id, whoever cheerfully accepts Allah as his Lord, Islam as his religion and Mubammad as his Apostle (ﷺ) is necessarily entitled to enter Paradise. He (Abu Sa'id) wondered at it and said: Messenger of Allah, repeat it for me. He (the Messenger of Allah) (ﷺ) did that and said: There is another act which elevates the position of a man in Paradise to a grade one hundred (higher), and the elevation between one grade and the other is equal to the height of the heaven from the earth. He (Abu Sa'id) said: What is that act? He replied: Jihad in the way of Allah! Jihad in the way of Allah!
Hadith Commentary:Benefits and Issues: From this hadith, it is understood that a person may enter Paradise even without engaging in jihad, but those ranks and degrees which are extremely lofty and most noble will be deprived from him, and he will remain deprived of those blessings which a person cannot even imagine in this world.
Source: Tuhfat al-Muslim: Commentary on Sahih Muslim, Page: 4879
´It was narrated from Abu Sa'eed Al-Khudri that the Messenger of Allah (ﷺ) said:` "O Abu Sa'eed! Whoever is content with Allah as Lord, Islam as his religion and Muhammad as Prophet, then he is guaranteed Paradise." Abu Sa'eed found this amazing and said: "Say it to me again, O Messenger of Allah." So he did that, then the Messenger of Allah (ﷺ) said: "And there is something else by means of which a person may be raised one hundred degrees in Paradise, each of which is like that which is between the Heaven and the Earth." He said: "What is it, O Messenger of Allah?" He said: "Jihad in the cause of Allah, Jihad in the cause of Allah."
Hafiz Muhammad Ameen
“They seemed very strange” because, apparently, Paradise has been promised for something easy, although in reality this is a very difficult task, because knowledge of contentment (rida) will be determined by actions. And providing proof of faith through actions itself is a difficult task. Another meaning could be that “they seemed very excellent,” because for the believer this is a tremendous glad tidings.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 3133
Abu Saeed al-Khudri reported the Messenger of Allah ﷺ as saying: If anyone says "I am pleased with Allah as Lord, with Islam as religion and with Muhammad ﷺ as Messenger" Paradise will be his due.
Shaykh Umar Farooq Saeedi
1529. Commentary: The condition is that, along with the statement, there must also be affirmation through action and character.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 1529