I'll let you go

I'll (have to) let you go.

Fig. It is time to end this phone conversation. Well, I'll let you go. It's getting late. I have to go to work early tomorrow, so I'll let you go.
References in periodicals archive ?
Alternatively come and sing at our mayoral Christmas carols on December 7 for an hour and I'll let you go.
But I'll let you go to our family but mum please think of me.
But later works like I'll Let You Go, Memorial and The Chrysanthemum Palace demonstrated that he also had a lot more octaves as a writer that he could also write with tenderness and earnest emotion.
If you can tell me a story I haven't heard from speeders before, I'll let you go.
I was talking with someone on the phone just now, and for what must have been the millionth time it's happened to me alone, I heard my caller suddenly pronounce that tired old benediction: "Well, I'll let you go now.
ABC: I'll ask one more time and then I'll let you go.
He wasn't finished there, winding up with the painful: "It must be well past your bedtime so I'll let you go.
I'll pin 'em over in the corner, say, `Give me the girl and I'll let you go,' and they'll shove her at me and take off.
Well, I'll let you go this morning, but you must promise to come back later this afternoon for tea.
The only way I'll let you go is if you use all these presents you've gotten to keep warm
If you can give me a reason why you were speeding that I've never heard before, I'll let you go.
He then allegedly said: "Just one kiss and I'll let you go.
After he'd finished questioning her at the High Court in Perth he told her: "OK, I'll let you go now.