Sayyiduna Ubayd bin Sa'd (may Allah be pleased with him) narrates that this saying of the Prophet (peace and blessings be upon him) reached him; he said: "Whoever loves my fitrah (natural way) should follow my Sunnah, and marriage is part of my Sunnah."
Imam Abu Ya'la recorded this narration, and its narrators are thiqat (trustworthy), if Sayyiduna Ubayd bin Sa'd (may Allah be pleased with him) is a Companion; otherwise
this narration is mursal.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب النكاح / 7305