Sunan Abu Dawud
5106
Sahih+2

Narrated Aisha, Ummul Mu'minin: Boys used to be brought to the Messenger of Allah (ﷺ), and he would invoke blessings on them. Yusuf added: "and soften some dates and rub their palates with them". He did not mention "blessings

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid