Lord, keep my heart,
and my lips!

My sisters and I many years ago memorized the following scripture together. I still pray this word:
Psa 19:14
Let the words of my mouth, and the meditation of my heart, be acceptable in thy sight, O LORD, my strength, and my redeemer.
Here are some other thoughts on the tongue...

Pro 16:1
The preparations of the heart in man, and the answer of the tongue, [is] from the LORD.


Pro 18:21
Death and life [are] in the power of the tongue: and they that love it shall eat the fruit thereof.

Pro 31:26 She openeth her mouth with wisdom; and in her tongue [is] the law of kindness.

Pro 21:23 Whoso keepeth his mouth and his tongue keepeth his soul from troubles.

If you are tempted to reveal
A tale to you someone has told
About another, make it pass,
Before you speak, three gates of gold.
These narrow gates: First, "Is it true?"
Then, "Is it needful?"
In your mind
Give a truthful answer.
And the next
Is last and narrowest, "Is it kind?"
And if to reach your lips at last
It passes through these gateways three,
Then you may tell the tale,
nor fear
What the result of speech may be.
---Author Unknown