Satan threatens you with poverty and orders you to immorality, while Allāh promises you forgiveness from Him and bounty. And Allāh is all-Encompassing and Knowing.
The Encouragement to Spend Honest Money for Allah's Sake
Allah commands His believing servants to spend in charity, as Ibn `Abbas stated, from the pure, honest money that they earned and from the fruits and vegetables that He has grown for them in the land. Ibn `Abbas said, "Allah commanded them to spend from the purest, finest and best types of their money and prohibited spending from evil and dishonest money, because Allah is pure and good and only accepts that which is pure and good." This is why Allah said,
وَلاَ تَيَمَّمُواْ الْخَبِيثَ
(and do not aim at that which is bad) meaning, filthy (impure) money,
مِنْهُ تُنفِقُونَ وَلَسْتُم بِأَخِذِيهِ
(to spend from it, (though) you would not accept it) meaning, "If you were given this type, you would not take it, except if you tolerate the deficiency in it. Verily, Allah is far Richer than you, He is in no need of this money, so do not give, for His sake, what you would dislike for yourselves." It was reported that,
(2) Verses 268-269: وَمَا يَذَّكَّرُ إِلَّا أُولُو الْأَلْبَابِ الشَّيْطَانُ يَعِدُكُمُ الْفَقْرَ (الٰی قولہ): "Satan frightens you of poverty ... and only the men of understanding do observe the advice."
When a person is obsessed with the idea that spending in charity will cause him poverty, when he does not pick up the courage to go ahead and spend - even after hearing the warning of Allah Almighty - and continues feeling that he should not spend out of what he has, and when, turning away from the Divine promise, his mind takes him to rely on the promise of Satan, he should better be sure that this apprehension of his is being generated by Satan. He should never say that he has never seen Satan, so how could he take orders from him? Conversely, should he come to think that not only his sins will be forgiven by spending in charities, but also his wealth will be blessed with increase - he should then be sure that this thought has come from Allah for which he should be grateful to Him. Allah's treasure never runs short. He knows fully well - the open, the hidden, the intentions, the deeds - everything about everyone.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 268–271
There are two ways of spending one’s earnings in this world. One is to spend in ways shown by Satan. Another is to spend in ways shown by God. What Satan does is to impress on the minds of human beings the importance of personal requirements, and bring about conviction that all their earnings are best spent on personal comforts and luxuries. When Satan sees that any individual has more wealth than is necessary for his personal needs, he kindles in him another desire, that of indulging in showy activities. At the instigation of Satan, man spends all his money on ostentatious living and feels happy that he has spent his money in the best possible way. What is desired of man is that he should not regard his wealth as his personal possession but rather as something that belongs only to God. He should spend as much of his wealth as is necessary for his actual needs and the rest he should spend on achieving higher goals. He should give this surplus wealth to the weaker of God’s servants and also spend for the cause of God’s religion. When he spends for the weaker section of society, he hopes that in the Hereafter, when he appears empty-handed before God, he will not be deprived of God’s blessings. Similarly, when he spends his wealth for the cause of God’s religion, he allies himself with God’s mission.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.