1 Corinthians 8:8; 1 Corinthians 14:12; 1 Corinthians 15:58

8 But food will not commend us to God; we are neither the worse if we do not eat, nor the better if we do eat.
12 So also you, since you are zealous of spiritual gifts, seek to abound for the edification of the church.
58 Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord , knowing that your toil is not in vain in the Lord .