Where does scripture condemn masturbation?
I don’t know what “Cletus!” is trying to get at, but I’ve never found a verse that condemns the act of masturbation. I think it’s a natural way of release. That verse about Onan spilling his seed has nothing to do with masturbation. It was an Old Testament law that if your brother dies and leaves a barren wife, you are supposed to marry her and continue your line. Onan’s brother died, and it was Onan’s responsibility to marry and make a child with his dead brother’s wife. God killed Onan because at the last minute he disobeyed that law. He wasn’t killed for wasting sperm. Read it in context and study it, it’s all there!
There is no place where it specifically condemns masturbation. Other than that Onan was killed in Genesis 389-10 for spilling his seed upon the ground rather then raising up seed. As others have mentioned we are not to commit adultery with our eyes and heart outside of marriage. Leviticus 15 speaks of the product of masturbation that caused everything that the sperm or orgasmic material (called running issue in the KJV) comes upon. It also speaks of the seed of copulation, etc. The woman would also be required to wash etc.
scripture doesn’t condemn anything although it does point out sexual lust and immorality are ungodly and unchristlike…and masturbation is lust because it provokes sexual images in the mind and usually done to ungodly acts such as sex outside of marriage…however god knows we aren’t perfect and he’ll forgive all your sins even masturbationn (the mathew scripture is however saying that it shouldn’t be done and is more beneficial to get rid of the problem than to cause other brothers in Christ to be more lustful just because you wanted to masturbate)