Matthew 22:36-40 (NET)
36 “Teacher, which commandment in the law is the greatest?” 37 Jesus said to him, “‘Love the Lord your God with all your heart, with all your soul, and with all your mind.’ 38 This is the first and greatest commandment. 39 The second is like it: ‘Love your neighbor as yourself.’ 40 All the law and the prophets depend on these two commandments.”
Matthew 28:18-20 (ESV)
18 And Jesus came and said to them, “All authority in heaven and on earth has been given to me. 19 Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, 20 teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age.”
John 14:15-24 (ESV)
15 “If you love me, you will keep my commandments. 16 And I will ask the Father, and he will give you another Helper, to be with you forever, 17 even the Spirit of truth, whom the world cannot receive, because it neither sees him nor knows him. You know him, for he dwells with you and will be in you.
18 “I will not leave you as orphans; I will come to you. 19 Yet a little while and the world will see me no more, but you will see me. Because I live, you also will live. 20 In that day you will know that I am in my Father, and you in me, and I in you. 21 Whoever has my commandments and keeps them, he it is who loves me. And he who loves me will be loved by my Father, and I will love him and manifest myself to him.” 22 Judas (not Iscariot) said to him, “Lord, how is it that you will manifest yourself to us, and not to the world?” 23 Jesus answered him, “If anyone loves me, he will keep my word, and my Father will love him, and we will come to him and make our home with him. 24 Whoever does not love me does not keep my words. And the word that you hear is not mine but the Father's who sent me.
John 14:15 (NET)
If you love me, you will obey my commandments.
John 15:10 (NET)
If you obey my commandments, you will remain in my love, just as I have obeyed my Father’s commandments and remain in his love.
1 John 5:3 (ESV)
For this is the love of God, that we keep his commandments. And his commandments are not burdensome.
Jeremiah 7:23 (ESV)
But this command I gave them: ‘Obey my voice, and I will be your God, and you shall be my people. And walk in all the way that I command you, that it may be well with you.’