In the well known hadith, the Prophet ﷺ said:
Seven types of people Allah will shade them by His Shade on the Day of Resurrection when there will be no shade except His Shade. They will be, a just ruler, a young man who has been brought up in the worship of Allah, a man whose heart is attached to mosques, two people who love each other for only Allah’s Sake, where they associated together because of Him and dissociated from each other because of Him, a man who is called by a charming lady of noble birth to commit illegal sexual intercourse with her, and he said, ‘I am afraid of Allah, a man who gives in charity secretly such that his left hand does not know what his right hand has given and a man who remembers Allah in seclusion and his eyes are then flooded with tears.
Out of the seven noble actions listed above, loving another for the sake of Allah is the one that perhaps requires the least physical exertion – it is a condition of the heart and one that can be achieved through a refinement of the heart and our intention.
He ﷺ also said:
“Allah (swt) says on the Day of Judgment: Where are those who loved one another for My glory? Today I will shade them in My shade on the Day when there is no shade but Mine (Muslim).