What supports the authenticity of this hadith is what

Narrated by Muslim in his Sahih on the authority of Ibn Imran, the Messenger of God, may God’s prayers and peace be upon him, used to give Omar ibn al-Khattab a gift, and he would say, “Give it to him, O Messenger of God, he is poorer for him than I am,” so the Messenger of God, may God’s prayers and peace be upon him, said to him. And peace be upon you, take it and finance it or give it in charity. And whatever this money comes to you while you are not honorable or begging, take it, and whatever you do not, do not follow it yourself.

The great do not ask anything from anyone unless God is their witness in things, and they do not return anything they have given, for etiquette is with God. Not to return to God what He has given you .