Acts 8:38
And he commanded the chariot to stand still: and they went down both into the water, both Philip and the eunuch; and he baptized him.
Cross-references
Acts 16:15
Parallel
Acts 16:15 records Lydia's baptism—another example in Acts of a new believer being baptized immediately after conversion, mirroring the eunuch's pattern.
John 3:23
Parallel
John 3:23 notes John baptized where water was abundant—reinforcing that full immersion was practiced, as seen here with both going down into the water.