Ibn ʿUyaynah narrated—through ʿAmr, from ʿIkrimah—who said:
“When Fāṭimah gave birth to Ḥasan she brought him to the Messenger of Allah ﷺ, and he named him Ḥasan. When she later bore the next child he named him Ḥusayn, remarking, ‘This one is lovelier than that one.’ He thus derived the second name from the first.
Al-Zubayr ibn Bakkār reported that Ḥasan—so he specifies—was born in mid-Ramaḍān of the year 3 AH, though the opinion that he was born in Shaʿbān is the sounder view.
The two Sufyāns transmitted—from ʿĀṣim ibn ʿUbayd Allah, from ʿUbayd Allah ibn Abī Rāfiʿ, from his father—that the Prophet ﷺ pronounced the adhan in Ḥasan’s ear at the moment of his birth. (1)
Ayyūb related—from ʿIkrimah, from Ibn ʿAbbās—that the Prophet ﷺ performed the ʿaqīqah for Ḥasan and Ḥusayn, a single ram for each of them. (2)
Sharīk narrated—from Ibn ʿAqīl, from ʿAlī ibn al-Ḥusayn, from Abū Rāfiʿ—who said:
“When Fāṭimah had given birth to Ḥasan she asked, ‘Messenger of Allah, shall I offer a blood sacrifice for my son?’ He replied, ‘No. Instead, shave his head and give in charity the weight of his hair in silver to the needy.’ So I did.” (3)
= He also ascribes it to Abu Yaʿla and al-Bazzar, adding: “Among its transmitters is ʿAbd Allah ibn Muhammad ibn ʿAqil; his reports are judged hasan, and the rest of the chain consists of narrators found in the two Sahihs.”
(1) ʿAsim ibn ʿUbayd Allah is weak, whereas the remaining transmitters are trustworthy. The report is likewise recorded in the Musannaf (no. 7986), the Musnad (6/9, 392), Sunan Abu Dawud (5105), Jamiʿ al-Tirmidhi (1514), al-Tabarani (2578), and al-Bayhaqi (9/305). It has supporting evidence from a hadith of Ibn ʿAbbas preserved by al-Bayhaqi in Shuʿab al-Iman and strengthened by Ibn al-Qayyim in Tuhfat al-Mawdud, p. 31.
(2) Reported by Abu Dawud (2841) in “The Book of Sacrificial Animals,” chapter “The ʿAqiqah,” by al-Tabarani (no. 2566), and by al-Nasaʾi (7/166). The chain is sound, a judgement affirmed by Ibn Daqiq al-ʿId. A corroborating narration from Anas appears above on p. 246, note (1).
(3) Transmitted by Ahmad (6/390, 392) and by al-Tabarani (917; 2576). Al-Haythami cites it in Majmaʿ al-Zawaʾid (4/57) and grades it hasan. The original wording reads badana (“a camel”) instead of bidam (“with blood”). See Ibn al-Qayyim, Tuhfat al-Mawdud, pp. 97, 99.