2 Peter 3:8

But there is one thing, my brethren, you ought to be appriz'd of, which is this, that "with the Lord one day is as a thousand years, and a thousand years as one day."

Romans 11:25

I would not, brethren, have you ignorant of this secret, (for fear you should presume too much on your selves) that blindness has fallen upon a part of Israel, until the time when the Gentiles shall be fully come in.

1 Corinthians 10:1

I would not have you ignorant, my brethren, that all our fathers were under the Cloud, all passed thro' the sea:

1 Corinthians 12:1

Now concerning those who are spiritual, my brethren, I would not have you be mistaken.

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
I would not, brethren, have you ignorant of this secret, (for fear you should presume too much on your selves) that blindness has fallen upon a part of Israel, until the time when the Gentiles shall be fully come in.
1 Corinthians 10:1
I would not have you ignorant, my brethren, that all our fathers were under the Cloud, all passed thro' the sea:
1 Corinthians 12:1
Now concerning those who are spiritual, my brethren, I would not have you be mistaken.

General references

Hebrews 10:37
only wait but a little while, and he that is to come, will come without delay.