Section 18 of The Bharatiya Sakshya Adhiniyam :Admissions by persons expressly referred to by party to suit.

Admissions by persons expressly referred to by party to suit. The Bharatiya Sakshya Adhiniyam 2023
Statements made by persons to whom a party to the suit has expressly referred for information in reference to a matter in dispute are admissions.
Illustration
The question is, whether a horse sold by A to B is sound.
A says to B– “Go and ask C, C knows all about it”. C’s statement is an admission.