"The request was granted, and “Paul stood on the stairs, and beckoned with the hand unto the people.” The gesture attracted their attention, while his bearing commanded respect. “And when there was made a great silence, he spake unto them in the Hebrew tongue, saying, Men, brethren, and fathers, hear ye my defense which I make now unto you.” At the sound of the familiar Hebrew words, “they kept the more silence,” and in the universal hush he continued: AA 408.2"
"And when he had given him licence, Paul stood on the stairs, and beckoned with the hand unto the people. And when there was made a great silence, he spake unto them in the Hebrew tongue, saying,"
The EGW passage directly quotes and paraphrases Acts 21:40, describing the same scene of Paul addressing the crowd from the stairs.