In our opinion it means that covenant which Allah had taken in the loins of their fathers when He said : “Am I not your Lord? They said: Yes.
Sunan Abi Dawud Book 42, Hadith 121
← Previous Hadith Malik was asked : The heretics argue from this tradition against us. Malik said : Argue against them from its last part which goes. The people asked : What do you think about the one who died while he was young? He replied : Allah knows best what he was going to do.

Sunan Abi Dawud Book 42, Hadith 120 Next Hadith → The woman who buries alive her new-born girl and the girl who is buried alive both will go to Hell. This tradition has also been transmitted by Ibn Mas’ud from the Prophet (May peace be upon him) to the same effect through a different chain of narrators.

Sunan Abi Dawud Book 42, Hadith 122