Ibn Jurayj says: I said to Nafi‘ (may Allah be pleased with him), "Have you heard ‘Abdullah ibn ‘Umar (may Allah be pleased with him) mention the names of the months of Hajj?" Nafi‘ (may Allah have mercy on him) said: "Yes, he used to mention Shawwal, Dhu al-Qa‘dah, and Dhu al-Hijjah." Ibn Jurayj says: I said to Nafi‘ (may Allah have mercy on him), "What if a man pronounces the Talbiyah for Hajj and enters Ihram before these months?" Nafi‘ (may Allah have mercy on him) replied: "I have not heard anything from him regarding this."
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 756
Hadith Takhrijصحيح : أخرجه البيهقي : 4 / 342 ـ وفي المعرفة السنن والآثار له (2687) ۔ وابن ابي شيبة (13629) ۔ والدارقطني : 2/ 228 ۔ وصححه الحاكم : (2/ 272)۔
It is narrated from Abu al-Zubair that he heard from Jabir bin Abdullah (may Allah be pleased with him) that he was asked about a man who assumes the Ihram for Hajj before the months of Hajj. He replied: No.
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 757
Hadith Takhrijاسناده ضعيف لعنة ابن جريج أخرجه البيهقي: 4 / 343 ـ وفي المعرفة السنن والآثار له (2690) ۔ والدارقطني : 2 / 234 ۔ وابن أبي شيبة (14618)۔