6 Bible Verses about Sins Of Omission

But you should not deceive yourselves by just listening [to God's word] instead of doing what the word teaches. For if anyone is [only] a listener to the word and does not practice it, he is like a person who sees his natural face in a mirror, and [then after] he sees himself, [he] goes away and immediately forgets what he looks like.read more.
But the person who looks closely into the perfect law that brings freedom, and continues to do so, is not a listener who forgets [what he hears], but someone who does the work [it requires]. This person will be blessed for doing so.

So, the person who knows the good [he ought] to be doing, but is not doing it, is sinning.

"It is too bad for you hypocritical experts in the law of Moses and [you] Pharisees! For you give a tenth of your mint, dill and cumin [i.e., small garden herbs used for seasoning or fragrance], and [yet] neglect the heavier responsibilities required by the law, [such as] justice, mercy and faith. You should have done these ["lighter"] things and not neglected to do the other ["heavier"] things [as well].

Then the Lord will answer them, 'Truly I tell you, since you did not do it for one of these least [significant brothers of mine], you did not do it for me.'

"But it is too bad for you Pharisees! For you give a tenth of your mint, rue and every [other] herb [Note: These were small garden plants used for seasoning or medicine] and [yet] neglect [demonstrating] justice and the love of God [toward others]. But you should have done these things and not neglected to do the other things [as well].

And that slave who knew what his master wanted, but did not make preparations [i.e., for his master's return], or do what his master wanted, will be whipped with many lashes.