Bread
.He took bread and salt, i.e. he took his oath. Bread and salt were formerly eaten when an oath was taken.
Cast thy bread upon the waters: for thou shalt find it after many days (Eccles. xi. 1). When the Nile overflows its banks the weeds perish and the soil is disintegrated. The rice-seed being cast into the water takes root, and is found in due time growing in healthful vigour.
Donʹt quarrel with your bread and butter. Donʹt foolishly give up the pursuit by which you earn your living.
To know which side one’s bread is buttered. To be mindful of one’s own interest.