Nafi' says that Abu Salamah asked Abdullah bin Umar (may Allah be pleased with them both) one day after the day of sacrifice, saying: I wish to offer a sacrifice. So Abdullah bin Umar (may Allah be pleased with them both) said: Whoever wishes to sacrifice today, and tomorrow as well, may do so.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19253