The Messenger of Allah ﷺ said, "There is no one who has done us a favor except that we have repaid him, save Abu Bakr. He has done us a favor that Allah will repay him for on the Day of Resurrection. No one's wealth has ever benefited me as the wealth of Abu Bakr has benefited me. Were I to take a close friend, I would have taken Abu Bakr as my close friend. Indeed, your companion is the close friend of Allah."
حدثنا علي بن الحسن الكوفي حدثنا محبوب بن محرز القواريري عن داود بن يزيد الأودي عن أبيه
قال رسول الله ﷺ ما لأحد عندنا يد إلا وقد كافيناه ما خلا أبا بكر فإن له عندنا يدا يكافيه الله بها يوم القيامة وما نفعني مال أحد قط ما نفعني مال أبي بكر ولو كنت متخذا خليلا لاتخذت أبا بكر خليلا ألا وإن صاحبكم خليل الله
Its isnad is daif. Dawud bin Yazid is daif (Taqrib). It has another route recorded by Ibn Majah, which Ibn Hibban graded sahih, hadith no. 94, but its chain is daif, containing Amash, who is a mudallis and narrated with an ambiguous form (an'ana). See also (al-Ihsan): 6819.