Give an example of a New Testament promise which God attached to His command.

One example of a New Testament promise that God attached to His command can be found in Matthew 6:33:

"But seek first his kingdom and his righteousness, and all these things will be given to you as well."

In this verse, Jesus commands His disciples to prioritize seeking God's kingdom and righteousness above everything else. However, attached to this command is the promise that if they do so, all other necessary things will be provided to them as well.

This promise assures believers that if they put God first in their lives, trust in Him wholeheartedly, and seek His kingdom and righteousness diligently, He will take care of their needs, providing them with everything they require. It encourages believers to have faith in God's provision and prioritize their relationship with Him above worldly concerns.