All praise is due to Allah, and peace and blessings be upon our Master, the Messenger of Allah.

Supplication is a prescribed form of worship, and believers are encouraged to seek Allah's blessings for both worldly and spiritual matters. The Quran states {what means}, 'And when My servants ask you concerning Me - indeed, I am near. I respond to the invocation of the supplicant when he calls upon Me.' Additionally, Allah says {what means}, 'And your Lord has said, "Call upon Me; I will respond to you." Indeed, those who are arrogant about My worship will enter Hell, humiliated.' " [Ghafir, 60].

The Prophet Muhammad taught us the proper way to supplicate to Allah, emphasizing humility and submission. He instilled in us the importance of having complete faith in Allah's ability to answer our prayers, as evidenced by his saying, 'Supplication is the only thing that can change destiny, and righteous deeds are the only way to increase one's lifespan.' [Transmitted by al-Tirmidhi].

It should be noted that the meaning of this hadith is to point towards one of the greatest doors of goodness and worship, which is supplication. It does not mean that Allah's eternal decree can change or alter. Rather, the meaning is that the supplications of His creation, their needs, and all their affairs are predestined by Allah, decreed in an eternal decree that does not change. This is a guidance for His servants not to grow weary of worship and supplication, for they are keys to good in this life and the next. A servant supplicates to Allah to provide him with a righteous wife, and he is sincere in his supplication and humble before Allah, not knowing where the fixed decree lies. He entrusts all his affairs to Allah.

Moreover, Allah has alluded to this meaning in His saying, the Exalted: 'Allah erases what He wills and establishes what He wills, and with Him is the Mother of the Book.' [Al-Ra`id, 39]. Moreover, the servant cannot know the unseen or what Allah has decreed for him. Therefore, he must supplicate to Allah out of obedience and in compliance with His command.

Imam Ibn Furk, may Allah have mercy upon him, clarified this meaning. He said, "It is narrated that the Prophet, peace be upon him, said: "The decree and supplication contend with each other." And it is also narrated that he said: "Charity repels the fixed decree." The meaning of these narrations is as we have mentioned: that which precedes in knowledge regarding what happens in the future is that if one supplicates, the calamity is averted from him. Similarly, if one gives charity. It does not mean that it is known from eternity that the calamity will befall him, and then when supplication occurs, the known changes, for that would lead to the conclusion that it was not known from eternity and thus not a decree, which is impossible. ' 

Therefore, a believer supplicates in obedience to Allah's command and seeks medical treatment in obedience to Allah's command. For both, he receives reward. As for the outcomes, Allah has the upper hand in that. Every rational, believing person with experience can perceive the effect of supplication just as they can perceive the effect of medicine. In fact, sincere believers can attain through supplication what material means cannot achieve. This is the favor that Allah bestows upon whom He wills. And Allah is the Possessor of immense favor. And Allah The Almighty knows best.