Sayyiduna Abu al-Darda (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) praying witr while the people had stood up for the morning prayer.
Only Hatim bin Salim al-Basri, who is also called al-A'raji, narrated it, and the hadith of Ibn Jurayj is more authentic than it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4519