The exciting thing about the promise of hundredfold return is that anything that can be produced by the Word of God has the potential for a hundredfold return. You will find all the way through the Old Testament that people’s crops were multiplied a hundredfold (see Genesis 26:12). This is God’s principle of return on the covenant.
When you plant, there will be a hundredfold return coming in response: whether it be words, faith, money, etc. The whole kingdom of God operates according to this principle: seed planting and harvest!