Verse 57

अन्यात्मन्यात्मभावेन देहमात्रास्थयानया ।पुत्रदारकुटुम्बैश्च चेतो गच्छति पीनताम्

In plain words

Through the sense of self placed on what is not the self, resting merely on the body, and through sons, wife, and kin, citta goes to grossness.