What burial customs were used for dead warriors in ancient Arabia?

In ancient Arabia, a notable custom associated with the death of a warrior was to tie his mount to his tomb and leave the animal there to die.1

More generally, the dead were typically buried under mounds of stones or in burial chambers carved directly into rock, such as cliffs or underground sites. In some regions, such as among the Safaite Bedouin, it was customary to add a stone to the heap marking a grave, sometimes inscribed with an expression of grief. While some archaeological findings in Hadramawt have revealed tombs containing ritually beheaded kneeling camels, it is not clear if this practice is related to the custom of leaving a warrior's mount to die at his tomb.1