You shall walk after the Lord your God and fear Him, and keep His commandments and obey His voice; you shall serve Him and hold fast to Him. (Deuteronomy 13:4)

Then Jesus said to him, "Away with you, Satan! For it is written, 'You shall worship the Lord your God, and Him only you shall serve.'" (Matthew 4:10)

No one can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon." (Matthew 6:24)

Take careful heed to do the commandment and the law which Moses the servant of the Lord commanded you: to love the Lord your God, to walk in all His ways, to keep His commandments, to hold fast to to Him and to serve Him with all your heart and with all your soul. (Joshua 22:5)

It shall be that if you earnestly obey My commandments which I command you today, to love the Lord your God and serve Him with all your heart and with all your soul, then I will give you the rain for your land in its season, the early rain and the latter rain, that you may gather in your grain, your new wine and your oil. And I will send grass in your fields for your livestock, that you may eat and be filled. (Deuteronomy 11:13-15)

I beesech you therefore, brethren, by the mercies of God, that you present your bodies a living sacrifice, holy, acceptable to God, which is your reasonable service. And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God. (Romans 12:1, 2)

And now, Israel, what does the Lord your God require of you, but to fear the Lord your God, to talk in all His ways and to love Him, to serve the Lord your God with all your heart and with all your soul. (Deuteronomy 10:12)

Be kindly affectionate to one another with brotherly love, in honor giving preference to one another; not lagging in diligence, fervent in spirit, serving the Lord ... distributing to the needs of the saints, given to hospitality. (Romans 12: 10, 11, 13)

You shall serve the Lord your God, and He will bless your bread and your water. And I will take sickness away from the midst of you. No one shall suffer miscarriage or be barren in your land; I will fulfill the number of your days. (Exodus 23:25, 26)

If it seems evil to you to serve the Lord, choose for yourselves this day whom you will serve, whether the gods which your fathers served ithat were on the other side of the River, or the gods of the Amorites, in whose land you dwell. But as for me and my house, we will serve the Lord. (Joshua 24:15)

Serve the Lord with gladness; Come before His presence with singing. (Psalm 100:2)