en_tn_lite_do_not_use/act/17/02.md

went to them ... reasoned with them

"went to the Jews ... reasoned with the Jews"

as his custom was

"as his habit was" or "as his common practice was." Paul usually went to the synagogue on the Sabbath when Jews would be present.

for three Sabbath days

"on each Sabbath day for three weeks"

reasoned with them from the scriptures

"gave them reasons to believe from the scriptures" or "debated with them about the scriptures" or "discussed the scriptures with them." Paul explained what the scriptures mean in order to prove to the Jews that Jesus is the Messiah. (See: rc://en/ta/man/jit/figs-explicit)