as above (the sub narrators are different). Abu Huraira qualified the three children referred to in the above mentioned Hadith as not having reached the age of committing sins (i.e. age of puberty) .
Sahih al-Bukhari Book 3, Hadith 44
← Previous Hadith Some women requested the Prophet (ﷺ) to fix a day for them as the men were taking all his time. On that he promised them one day for religious lessons and commandments. Once during such a lesson the Prophet said, "A woman whose three children die will be shielded by them from the Hell fire." On that a woman asked, "If only two die?" He replied, "Even two (will shield her from the Hell-fire).

Sahih al-Bukhari Book 3, Hadith 43 Next Hadith → Whenever `Aisha (the wife of the Prophet) heard anything which she did not understand, she used to ask again till she understood it completely. Aisha said: "Once the Prophet (ﷺ) said, "Whoever will be called to account (about his deeds on the Day of Resurrection) will surely be punished." I said, "Doesn't Allah say: "He surely will receive an easy reckoning." (84.8) The Prophet (ﷺ) replied, "This means only the presentation of the accounts but whoever will be argued about his account, will certainly be ruined."

Sahih al-Bukhari Book 3, Hadith 45