it is

Proverbs 2:10
For wisdom will enter your heart, and knowledge will delight your soul.

Proverbs 3:17
Her ways are pleasant, and all her paths are peaceful.

Proverbs 24:13, 14
Eat honey, my son, for it is good, and the honeycomb is sweet to your taste. . . .

Psalm 19:10
They are more precious than gold, than much pure gold; they are sweeter than honey, than honey from the comb.

Psalm 119:103, 111, 162
How sweet are Your words to my taste, sweeter than honey in my mouth. . . .

Jeremiah 15:16
Your words were found, and I ate them. Your words became a delight to me and my heart's delight, for I bear Your name, O LORD God of Hosts.

within thee

Job 32:18, 19
For I am full of words, and my spirit within me compels me. . . .

John 7:38
Whoever believes in Me, as the Scripture has said: 'Streams of living water will flow from within him.'"

fitted

Proverbs 8:6
Listen, for I speak of noble things, and the opening of my lips will reveal right.

Proverbs 10:13, 21
Wisdom is found on the lips of the discerning, but a rod is for the back of him who lacks judgment. . . .

Proverbs 15:7
The lips of the wise spread knowledge, but not so the hearts of fools.

Proverbs 16:21
The wise in heart will be called discerning, and pleasant speech increases learning.

Proverbs 25:11
A word fitly spoken is like apples of gold in settings of silver.

Psalm 119:13, 171
With my lips I proclaim all the judgments of Your mouth. . . .

Malachi 2:7
For the lips of a priest should preserve knowledge, and people should seek instruction from his mouth, because he is the messenger of the LORD of Hosts."

Hebrews 13:15
Through Jesus, therefore, let us continually offer to God a sacrifice of praise, the fruit of lips that confess His name.