“Whoever sends fourth three of his children who had not reached
the
age of puberty, they will be a strong fortification for him
against
the Fire.” Abu Dharr said: “I sent forth two.” He said: “And
two” Ubayy bin Ka’b, the chief of the reciters, said: “I sent
forth
one.” He said: “Even one.”
Sunan Ibn Majah Book 6, Hadith 174