en_tn_condensed/mat/07/26.md

like a foolish man who built his house upon the sand

Jesus continues the simile from the previous verse. He compares those who do not obey his words to foolish house-builders. Only a fool would build a house on a sandy place where rain, floods, and wind can sweep the sand away. (See: rc://en/ta/man/translate/figs-simile)