Allah Almighty and His Messenger صَلَّى الـلّٰـهُ عَلَيْهِ وَاٰلِهٖ وَسَلَّم. Allah Almighty states in verse 185 of Sūrah Āl ꜤImrān:

فَمَنۡ زُحۡزِحَ عَنِ النَّارِ وَ اُدۡخِلَ الۡجَنَّۃَ فَقَدۡ فَازَ ؕ   وَ مَا الۡحَیٰوۃُ الدُّنۡیَاۤ اِلَّا مَتَاعُ  الۡغُرُوۡرِ (۱۸۵)

Translation from Kanz al-Īmān: So, the one who is saved from the Fire and is admitted into Paradise, he is successful. And the life of the world is indeed but the goods of deception.^[1]

It is written on page 112 in the 2^nd volume of Tafsīr Ṣirāṭ al-Jinān:

We come to know from this verse that true success on the Day of Judgement will be when a person is saved from Hell and admitted into Paradise. And although success in the world might be a personal achievement, if this success leads to harm in the hereafter, it is actually a means of loss. This is particularly the case for those individuals who do everything to achieve success in this world but do nothing to attain success in the hereafter; they are certainly in loss. Therefore, every Muslim must focus more on those actions that grant them true success and strive towards them, and avoid those actions that can become an obstacle on this path. We make duꜤāˈ to Allah Almighty that He grants us the ability to carry out righteous deeds and avoid sins, and that He bestows upon us true success.  اٰمِیْن

صَلُّوۡا عَلَى الۡحَبِيۡب         صَلَّى اللّٰهُ عَلٰى مُحَمَّد