Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "The fragrance of a child is part of the fragrance of Paradise."
Imam Tabarani recorded it in al-Mu'jam al-Saghir and al-Mu'jam al-Awsat from his teacher Muhammad bin Uthman bin Sa'id, and that narrator is da'if (weak).