According to the tradition, <span> the solomonids inherited </span>Ark of the Covenant The Ark of the Covenant is a wooden crest that written in the bible which contains the 10 commandments from the God. <span>The ark was placedin a holy tent for priests until Solomon placed the ark of the covenant in the Temple of Mount Sinai.</span>
The fact that they understand how long they need to sleep to avoid insomnia shows cognition; they have acquired knowledge on the sleeping process by experience and knowledge.