Romans 14:13-23

Paul talks about eating here, but if it serves you replace food with anything else that might cause others to stumble, food, sex, clothing, smoking, etc..

Emphasis added, verses bolded especially stood out to me.

Romans 14:13-23

(NRSV)

 Let us therefore no longer pass judgement on one another, but resolve instead never to put a stumbling-block or hindrance in the way of another. I know and am persuaded in the Lord Jesus that nothing is unclean in itself; but it is unclean for anyone who thinks it unclean. If your brother or sister is being injured by what you eat, you are no longer walking in love. Do not let what you eat cause the ruin of one for whom Christ died. So do not let your good be spoken of as evil. For the kingdom of God is not food and drink but righteousness and peace and joy in the Holy Spirit. The one who thus serves Christ is acceptable to God and has human approval. Let us then pursue what makes for peace and for mutual edification. Do not, for the sake of food, destroy the work of God. Everything is indeed clean, but it is wrong for you to make others fall by what you eat; it is good not to eat meat or drink wine or do anything that makes your brother or sister stumble. The faith that you have, have as your own conviction before God. Blessed are those who have no reason to condemn themselves because of what they approve. But those who have doubts are condemned if they eat, because they do not act from faith; for whatever does not proceed from faith is sin.

(NIV)

Romans 14:13-23

Therefore let us stop passing judgment on one another. Instead, make up your mind not to put any stumbling block or obstacle in the way of a brother or sister. I am convinced, being fully persuaded in the Lord Jesus, that nothing is unclean in itself. But if anyone regards something as unclean, then for that person it is unclean. If your brother or sister is distressed because of what you eat, you are no longer acting in love.  Do not by your eating destroy someone for whom Christ died. Therefore do not let what you know is good be spoken of as evil. For the kingdom of God is not a matter of eating and drinking, but of righteousness, peace and joy in the Holy Spirit, because anyone who serves Christ in this way is pleasing to God and receives human approval. 
  Let us therefore make every effort to do what leads to peace and to mutual edification. Do not destroy the work of God for the sake of food. All food is clean, but it is wrong for a person to eat anything that causes someone else to stumble. It is better not to eat meat or drink wine or to do anything else that will cause your brother or sister to fall. 
 So whatever you believe about these things keep between yourself and God. Blessed is the one who does not condemn himself by what he approves.  But whoever has doubts is condemned if they eat, because their eating is not from faith; and everything that does not come from faith is sin.