The Prophet (peace and blessings be upon him) said:
"Indeed, Allah Almighty has placed the truth upon the tongue of Umar (may Allah be pleased with him), and he speaks in accordance with it."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 1834
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[هـ] عن أبي ذر. المشكاة ٦٠٣٤: حم، د، ابن سعد.