2 Peter 3:8

But, beloved; be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.

Romans 11:25

For I would not have you, brethren, to be ignorant of this mystery, (least ye should be wise in your own eyes) that blindness in part is befallen Israel, till the fulness of the Gentiles be come in.

1 Corinthians 10:1

Now I would not have you ignorant, brethren, that all our fathers were under the cloud, and all passed through the sea;

1 Corinthians 12:1

Now concerning spiritual gifts, my brethren, I would not have you ignorant.

Treasury of Scripture Knowledge

Summary

But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day.

General references

Bible References

Be not

Romans 11:25
For I would not have you, brethren, to be ignorant of this mystery, (least ye should be wise in your own eyes) that blindness in part is befallen Israel, till the fulness of the Gentiles be come in.
1 Corinthians 10:1
Now I would not have you ignorant, brethren, that all our fathers were under the cloud, and all passed through the sea;
1 Corinthians 12:1
Now concerning spiritual gifts, my brethren, I would not have you ignorant.

General references

Hebrews 10:37
For yet a little while, and He, that is coming, will come, and will not delay: