It is narrated from Masruq (may Allah have mercy on him) that Abdullah (may Allah be pleased with him) said: By Allah, I am ready to invoke a mutual curse (mubahalah) with whoever wishes, that the shorter Surah al-Nisa was revealed after 'four months and ten days' [Surah al-Baqarah: 234]. And it is narrated from Muslim Abu al-Duha (may Allah have mercy on him) that Ali (may Allah be pleased with him) used to say: The later of the two terms.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العدد / 15474