Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: A person asked the Prophet Muhammad (peace and blessings be upon him) about Witr, so he (peace be upon him) said: "Separate the two rak'ahs and the one rak'ah by saying salam between them."
Hadith Referenceسنن الدارقطني / كتاب الوتر / 1677
Hadith Takhrij«أخرجه الدارقطني فى ((سننه)) برقم: 1677، 1678»