The Prophet (peace and blessings be upon him) said:
"The most beloved of servants to Allah Almighty is the one who is most beneficial to His dependents (that is, His creation)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 172
Hadith Gradingالألبانی:حسن
Hadith Takhrij[عبد الله في زوائد الزهد] عن الحسن مرسلا. الروض النضير ٤٨١.