en_tn/act/15/08.md

General Information:

The word "them" refers to the Gentiles, and both instances of "you" are plural. (See: rc://en/ta/man/jit/figs-you)

who knows the heart

Here "heart" refers to the "minds" or "inner beings." Alternate translation: "who knows the people's minds" or "who knows what people think" (See: rc://en/ta/man/jit/figs-metonymy)

has testified to them

"has testified to the Gentiles"

giving them the Holy Spirit

"causing the Holy Spirit to come upon them"