Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) bought a horse from a man named Sawa' bin al-Harith, and that man denied the sale. Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him) testified in favour of the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) asked: "Why did you testify in our favour when you were not present with us?" He replied: "The reason is that you speak the truth about what you have brought, and I know that you say nothing but the truth." Then the Prophet (peace and blessings be upon him) said to him: "Whoever Khuzaymah testifies for, or testifies against, his testimony alone will suffice."
Al-Tabarani recorded it, and all of its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15780
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (3730) ، أخرجه المستدرك على الصحيحين برقم: 2234، وأخرجه المعجم الكبير للطبراني برقم: 3730، وأخرجه الأوسط في السنن والإجماع والاختلاف برقم: 6752، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 6835/2»