The seed.

Isaiah 8:20
To the law and to the testimony! If they do not speak according to this word, they have no light of dawn.

Matthew 13:19
When anyone hears the message of the kingdom but does not understand it, the evil one comes and snatches away what was sown in his heart. This is the seed sown along the path.

Mark 4:14
The farmer sows the word.

1 Corinthians 3:6, 7, 9-12
I planted the seed and Apollos watered it, but God made it grow. . . .

James 1:21
Therefore, get rid of all moral filth and every expression of evil, and humbly receive the word planted in you, which can save your souls.

1 Peter 1:23-25
For you have been born again, not of perishable seed, but of imperishable, through the living and enduring word of God. . . .