# The kingdom of heaven is like yeast

The spread of the kingdom is like the spreading of the yeast. 

# The kingdom of heaven is like

"When our God in heaven shows himself to be king, it will be like" 

# three measures of flour

If your culture does not have something to measure large amounts, you could simple say "a large amount of flour."

# until all the dough had risen

Women would mix flour, water, and yeast together to make dough, and the yeast would make the dough rise.