Musnad Ahmad 31:119

Husayn ibn Muhammad narrated to us, Sulayman ibn Qarm narrated to us, from Abd al-Rahman—meaning Ibn al-Asbahani—from Abu Salih, from Abu Sa’id al-Khudri, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever presents three of his children, they will veil him from the Fire."