Doing Hereafter acts (acts of worship) for worldly gain

This has TWO scenarios: THE FIRST SCENARIO: If the intention is purely for the sake of worldly gain, such as wealth, leadership, and status, with no intention for the Hereafter, then this person is sinful, and his deeds are invalid, as Allah says (interpreted meaning): "Whoever desires the life of this world and its adornments, We will repay them in full for their deeds therein, and they therein will not be deprived. Those are the ones for whom there is nothing in the Hereafter but the Fire. And lost is what they did therein, and worthless is what they used to do." [Surah Hud, 15-16] THE SECOND SCENARIO: If their intention is a combination between seeking reward and worldly gain, then this has two forms: FIRST FORM: If this intention is showing off (Riyaa), then it is never permissible, and the deed contaminated with Riyaa is invalid. This is supported by the Hadith Qudsi: "Allah, the Exalted, said: 'I am the One Who is least in need of partners. Whoever does a deed in which he associates anyone else with Me, I will abandon him with his polytheism.'" NOTE: The difference between this and the previous one is that the latter intends to be praised and recognised as a worshipper of Allah, while the former does not care whether people praise him for it or not. SECOND FORM: If the intention is a combination between seeking reward and worldly gain (OTHER THAN RIYAA), then this has THREE CASES: 1⃣: If the dominant intention is seeking worldly gain, and the Hereafter is secondary, the deed is invalid and the person is sinful. NOTE: The determing factor here is the predominance of the intention. 2⃣: If their predominant intention is for Allah, and the worldly gain is secondary, then the deed is valid, but the reward is diminished according to the extent of their worldly intention, as the Prophet said: "No one goes out to fight in the cause of Allah, seeking victory and worldly gain, except that they will have two-thirds of their reward given to them in this world, and only one-third will remain for them in the Hereafter. And if they are not granted any spoils of war, their reward will be complete." [Narrated by Muslim on the authority of Abdullah ibn Amr] 3⃣: If the intentions (worldly and Hereafter) are equal or close, then the deed is also valid, but the reward is diminished according to that intention, and they may not receive any reward. As-Sa'di rahimahullah said: "If someone performs an act of worship for the sake of Allah and for worldly gain, with both intentions being equal or close, then even if they remain a believer, their Eman, Tawheed, and sincerity are deficient, and their deed is flawed due to lacking complete sincerity." Summarised from: الملخص المفيد في شرح كتاب التوحيد (434 - 435) تأليف: أبي عبدالله طارق بن يوسف بن عباس الوليدي