Matthew 11:25

At that season Jesus, answering, said, "I thank Thee, O Father, Lord of the heaven and of the earth, because Thou didst hide these things from the wise and discerning, and didst reveal them to babes.

Ephesians 1:9

making known to us the mystery of His will, according to His good pleasure which He purposed in Him,

Hebrews 4:3

For we who believed do enter into rest, even as He said, "As I swore in My wrath, they shall not enter into My rest; although the works were finished from the founding of a world."

Hebrews 6:16-18

For men swear by the greater; and the oath for confirmation is an end, to them, of every dispute:

Treasury of Scripture Knowledge

Summary

The LORD of hosts hath sworn, saying, Surely as I have thought, so shall it come to pass; and as I have purposed, so shall it stand:

General references

Bible References

Surely

Matthew 11:25
At that season Jesus, answering, said, "I thank Thee, O Father, Lord of the heaven and of the earth, because Thou didst hide these things from the wise and discerning, and didst reveal them to babes.
Ephesians 1:9
making known to us the mystery of His will, according to His good pleasure which He purposed in Him,

General references

Ephesians 3:11
according to a purpose of the ages which He made in Christ Jesus our Lord,