'Soft' in the Bible

The wise workman makes selection of the mulberry-tree of the offering, a wood which will not become soft; so that the image may be fixed to it and not be moved.

Come and take your seat in the dust, O virgin daughter of Babylon; come down from your seat of power, and take your place on the earth, O daughter of the Chaldaeans: for you will never again seem soft and delicate.