The custom started long, long ago when first the wise men three... gave gifts of love, of love, to a newborn baby.

41 seconds sound clip from the Santa Claus Is Comin' to Town (1970) movie soundboard.

You can hear this line at 00:43:20.857 in the Blu-ray version of the movie.

Quote context

[...]

- And then Kris and Jessica placed their wedding gifts to each other under the trees.

- No church ever looked nicer.

- Oh, please. Let me have just a little magic.

- The very first Christmas trees.

- What better way to tell you how much you mean to me, than a token of affection placed beneath the Christmas tree?

- The custom started long, long ago when first the wise men three... gave gifts of love, of love, to a newborn baby.

- But there was no rest for our little group of outcasts.

- Soon they were forced up beyond the reaches of civilization, up far past the most northern city, past where even most animals lived. Up to the North Pole.

- This is it, people. Ah, yes, this is it.

- We'll build ourselves a nice house. Heck, while we're at it, we'll build ourselves a castle, and the best toy factory in the world.

[...]