Hadith: Successful is the one who embraces Islam, is provided with mere subsistence, and Allah makes him content with what He has given him

عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ رضي الله عنهما أنَّ رَسولَ اللَّهِ صلَّى اللَّهُ عليْه وسلَّمَ، قال:
«قَدْ أَفْلَحَ مَن أَسْلَمَ، وَرُزِقَ كَفَافًا، وَقَنَّعَهُ اللَّهُ بما آتَاهُ».
[صحيح] - [رواه مسلم] - [صحيح مسلم: 1054]

‘Abdullah ibn ‘Amr ibn al-‘Ās (may Allah be pleased with him and his father) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said:
"Successful is the one who embraces Islam, is provided with mere subsistence, and Allah makes him content with what He has given him."
[Authentic hadith] - [Narrated by Muslim] - [Sahih Muslim - 1054]

Explanation

The Prophet (may Allah's peace and blessings be upon him) clarified that one who submits to his Lord and is, thus, guided and led to Islam, and is provided with just enough lawful sustenance to meet his needs, without excess or deficiency, and Allah makes him content and satisfied with what He has granted him has truly succeeded and achieved victory.

Benefits from the Hadith

1. A person's happiness lies in the perfection of his religion, the sufficiency of his livelihood, and his contentment with what Allah has given him.
2. Encouraging contentment with what you have been given of this world, along with Islam and the Sunnah.