Verily, the worst of living creatures before Allah are those who disbelieve, -- so they shall not believe. They are those with whom you made a covenant, but they break their covenant every time and they do not have Taqwa. Allah states here that the worst moving creatures on the face of the earth are those who disbelieve, who do not embrace the faith, and break promises whenever they make a covenant, even when they vow to keep them,وَهُمْ لَا يَتَّقُونَand they do not have Taqwa.meaning they do not fear Allah regarding any of the sins they commit