Malik related to me that Abd ar-Rahman ibn al-Qasim heard hisfather al-Qasim ibn Muhammad say, "I have prayed witr after dawn."Malik said, "Only a person who oversleeps so that he does notdo the witr prays it after dawn. No one should intentionally make hiswitr after dawn." (IT)
App reference (IT): Book 7, Hadith 28 (IT)
USC-MSA web (English) reference: Book 7, Hadith 28 (IT)
Arabic reference (IT): Book 7, Hadith 282 (IT)