﴿ وَلَا تَأْكُلُوٓا۟ أَمْوَٰلَكُم بَيْنَكُم بِٱلْبَٰطِلِ وَتُدْلُوا۟ بِهَآ إِلَى ٱلْحُكَّامِ لِتَأْكُلُوا۟ فَرِيقًۭا مِّنْ أَمْوَٰلِ ٱلنَّاسِ بِٱلْإِثْمِ وَأَنتُمْ تَعْلَمُونَ ﴾

“AND DEVOUR NOT one another's possessions wrongfully, and neither employ legal artifices with a view to devouring sinfully, and knowingly, anything that by right belongs to others.”

Thus the life of a believer is one of renunciation. For his entire life he has to keep himself away from certain things. The month of Ramadan serves as training for this. A life of restraint during the month of fasting gives us the lesson that the true servant of God is one who worships God at the level of taqwa, and lives a life of piety and fear of God. God will answer the call only of those who bring themselves closer to Him by living a life of sacrifice.