Matthew 6:24

"No man can be the bondservant of two masters; for either he will dislike one and like the other, or he will attach himself to one and think slightingly of the other. You cannot be the bondservants both of God and of gold.

Revelation 3:15-16

I know your doings--you are neither cold nor hot; I would that you were cold or hot!

Treasury of Scripture Knowledge

Summary

Ephraim, he hath mixed himself among the people; Ephraim is a cake not turned.

General references

Bible References

A cake

Matthew 6:24
"No man can be the bondservant of two masters; for either he will dislike one and like the other, or he will attach himself to one and think slightingly of the other. You cannot be the bondservants both of God and of gold.
Revelation 3:15
I know your doings--you are neither cold nor hot; I would that you were cold or hot!

General references

James 1:8
such a one is a man of two minds, undecided in every step he takes.