First Nephi 5:1-9
Sariah's faith in the necessity of Lehi's exodus was tested just like the rest of the family. She needed to make a choice, like Nephi, who's side she would be on - Laman or Lehi. After her sons returned to Jerusalem, leaving her and her husband alone in the wilderness to fend for themselves, her words sounded a lot like Laman and Lemuel - almost verbatim: "he was a visionary man...thou hast led us forth from the land of our inheritance, and my sons are no more, and we perish in the wilderness." Lehi knows she can be comforted with reassuring words, unlike his two eldest sons, who would only stop murmuring after Lehi confounded them by speaking in the power of the Spirit, until their frames shook before him.(1Ne2:14) He comforts her with his testimony "I know that the Lord will deliver my sons out of the hands of Laban, and bring them down again unto us in the wilderness."
When her sons do return, she considers it a sign, and is comforted by the Comforter, the Holy Ghost, who also gives her a testimony that what Lehi is doing is right. Her rhetoric switches from echoing that of Laman, to echoing that of Nephi in 1Ne 3:7