Hebrews 6:17-18

Since God wanted to show conclusively to those who would inherit the promise [i.e., Abraham and all of his spiritual descendants], how unchangeable His purpose was, He confirmed it with an oath.

Revelation 10:5-6

And the angel I saw standing on the ocean and on the land lifted up his right hand to heaven

Treasury of Scripture Knowledge

Summary

For I lift up my hand to heaven, and say, I live for ever.

General references

Bible References

General references

Hebrews 6:17
Since God wanted to show conclusively to those who would inherit the promise [i.e., Abraham and all of his spiritual descendants], how unchangeable His purpose was, He confirmed it with an oath.
Revelation 10:5
And the angel I saw standing on the ocean and on the land lifted up his right hand to heaven