Priority is mentioned in the Quran in these verses:
[9:120] Neither the dwellers of the city, nor the Arabs around them, shall seek to stay behind the messenger of God (when he mobilizes for war). Nor shall they give priority to their own affairs over supporting him. This is because they do not suffer any thirst, or any effort, or hunger in the cause of God, or take a single step that enrages the disbelievers, or inflict any hardship upon the enemy, without having it written down for them as a credit. God never fails to recompense those who work righteousness.
[14:3] They are the ones who give priority to this life over the Hereafter, repel from the way of God, and seek to make it crooked; they have gone far astray.
[16:107] This is because they have given priority to this life over the Hereafter, and God does not guide such disbelieving people.
[17:18] Anyone who chooses this fleeting life as his priority, we will rush to him what we decide to give him, then we commit him to Gehenna, where he suffers forever, despised and defeated.
[17:19] As for those who choose the Hereafter as their priority, and work righteousness, while believing, their efforts will be appreciated.
[59:9] As for those who provided them with a home and a refuge, and were believers before them, they love those who immigrated to them, and find no hesitation in their hearts in helping them. In fact, they readily give them priority over themselves, even when they themselves need what they give away. Indeed, those who overcome their natural stinginess are the successful ones.
To learn more, read the Quran in English.
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