There are traditional phrases that witches sometimes use when ending their spell. These final words activate the spell or send it out into the universe.
These common phrases serve to signal the subconscious that the spell is done. You’ve communicated your intention, and you’ve done your part to manifest your desire. You can use any of these phrases to complete your spell.
“So mote it be.”
“As I wish, so mote it be.”
“So it shall be.”
“As I will it, so shall It be.”
You can also use more modern language like, “This spell is complete.” Another option is to just stop talking. Your silence can be enough to complete your spell.