18 Okwalungiselwa usuku lwaba lunye nje kwakuyinkabi nezimvu eziyisithupha ezikhethekileyo; ngalungiselwa nezinyoni newayini eliningi lezinhlobo zonke kanye ngezinsuku eziyishumi; nokho angicelanga isinkwa sombusi, ngokuba ubugqila babusinda phezu kwalaba bantu.