to observe to # 05_DEU_15_05 # Only if thou carefully hearken unto the voice of the LORD thy God, to observe to do all these commandments which I command thee this day. 
to observe to # 05_DEU_28_15 # But it shall come to pass, if thou wilt not hearken unto the voice of the LORD thy God, to observe to do all his commandments and his statutes which I command thee this day; that all these curses shall come upon thee, and overtake thee: 
to observe to # 05_DEU_32_46 # And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.