It is mentioned in a Hadeeth (narration) that there are slaves of Allah the Almighty whom He has assigned for fulfilling the needs of others. He made them love goodness and endeared goodness to them and they will be saved from the torment of Allah the Almighty on the Day of Judgment. Who are these slaves?
May Allah reward you.

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.

This Hadeeth (narration) was narrated in Al-Mu‘jam Al-Kabeer, compiled by At-Tabaraani and in Musnad Ash-Shihaab.  However, it is a Dha‘eef Hadeeth (weak narration). There are no specific slaves whom Allah the Almighty distinguished to fulfill others' needs.

There are many Hadeeths that encourage Muslims to help each other. The Prophet, sallallaahu ‘alayhi wa sallam, told us that a Muslim is a brother to his fellow Muslim; he should not wrong nor harm him but rather support him. Anyone who helps his brother accomplish a need or supports him in times of adversity, Allah the Almighty will soothe him on the Day of Judgment and will grant him peace and safety. [Al-Bukhari and Muslim]

There is a Hadeeth in which the Prophet, sallallaahu ‘alayhi wa sallam, told us that anyone who alleviates the worldly suffering of his Muslim brother, Allah the Almighty will alleviate his fear and hardship on the Day of Judgment; anyone who relieves a Muslim in distressed circumstances, Allah the Almighty will facilitate matters for him in this worldly life and in the Hereafter; and Allah the Almighty supports the slave as long as he supports his brother.  [Muslim, Ahmad and others]

Consequently, anyone who exerts efforts to help others achieve their needs, based on this encouragement, Allah the Almighty will ease his difficulties. These efforts will also be a reason for his safety on the Day of Judgment, provided that his intention is to seek the reward of Allah the Almighty.

Allah Knows best.