1 Timothy 6:3

If any one deviate from this doctrine, not adhering to the wholesome instructions of our Lord Jesus Christ, the true doctrine of piety,

Revelation 2:7

he that hath an ear, let him hear what the spirit saith to the churches, to him that overcometh will I give to eat of the tree of life, which is in the paradise of my God."

Treasury of Scripture Knowledge

Summary

A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.

Bible References

A tree

1 Timothy 6:3
If any one deviate from this doctrine, not adhering to the wholesome instructions of our Lord Jesus Christ, the true doctrine of piety,
Revelation 2:7
he that hath an ear, let him hear what the spirit saith to the churches, to him that overcometh will I give to eat of the tree of life, which is in the paradise of my God."