Examples of using "тверди" in a sentence and their english translations:
And God said: Let there be lights made in the firmament of heaven, to divide the day and the night, and let them be for signs, and for seasons, and for days and years: to shine in the firmament of heaven, and to give light upon the earth, and it was so done.
God also said: let the waters bring forth the creeping creature having life, and the fowl that may fly over the earth under the firmament of heaven.
And he set them in the firmament of heaven to shine upon the earth. And to rule the day and the night, and to divide the light and the darkness. And God saw that it was good.