In your dream, the prominent symbols are the black horse and the act of riding swiftly through the city. Let us explore these symbols in light of traditional Islamic interpretations:

1. Horse (حصان - ḥiṣān): In dreams, a horse can symbolize strength, power, and a strong will. Riding a horse suggests control over personal ambitions and efforts. If the horse is swift, it can indicate quick success or progress in a particular endeavor.

2. Black Horse (حصان أسود - ḥiṣān aswad): The color black often represents authority, mystery, or the unknown. A black horse might suggest uncharted territories in your life, or hidden aspects of your ambitions that are being revealed as you journey through life at a rapid pace.

3. Racing through the city: This action might symbolize your drive and determination in a personal or professional capacity. The city represents society, community, or the realm of your everyday life, implying that your journey and control are not in isolation but among others.

Interpretation: The dream may reflect your current state of determination and confidence. The black horse under your control could signify a hidden strength or potential that you are beginning to harness effectively. Your rapid movement through the city suggests that you are making prompt and decisive progress in life. It also might imply an adventurous spirit or a readiness to face the unknown.

Spiritual Reflection: The black horse, being a powerful and mysterious entity, reminds us of the unknown aspects of Allah's plan. You are experiencing a journey filled with challenges and opportunities to display resilience. You are encouraged to trust in Allah (سُبْحَانَهُ وَتَعَالَى) and continue with your ambitions while maintaining humility and awareness of the divine guidance in your undertakings.

Always remember to seek guidance through prayer (Ṣalāh) and consultation (Istikhara) if facing decisions or uncertainties in your pursuits. May Allah grant you success in your endeavors.