1 Corinthians 10:31(ESV) So, whether you eat or drink, or whatever you do, do all to the glory of God.
1 Corinthians 3:16-17 (ESV) Do you not know that you are God's temple and that God's Spirit dwells in you? If anyone destroys God's temple, then God will destroy him. For God's temple is holy, and you are that temple.
1 Timothy 4:8 (ESV) For while bodily training is of some value, godliness is of value in every way, as it holds promise for the present life and also for the life to come.
Proverbs 11:17 (ESV) A man who is kind benefits himself, but a cruel man hurts himself.
3 John 1:2 (ESV) Beloved, I pray that all may go well with you and that you may be in good health, as it goes well with your soul.
The Bible does not tell us in so many words how to take care of ourselves but it assumes everyone will. Mark 31:12 tells us to love our neighbor as we love ourselves. It commands husbands to love their wives as their own bodies (Ephesians (5:28-29).
Sources: https://www.openbible.info/topics/taking_care_of_our_body
https://whatyoumakeitblog.com/10-bible-verses-on-self-care
