Adam Clarke on Genesis 45:27

When he saw the wagons - the spirit of Jacob - revived - The wagons were additional evidences of the truth of what he had heard from his sons; and the consequence was, that he was restored to fresh vigor, he seemed as if he had gained new life, ותחי vattechi, and he lived; revixit, says the Vulgate, he lived afresh. The Septuagint translate the original word by ανεζωπυρησε, which signifies the blowing and stirring up of almost extinguished embers that had been buried under the ashes, which word St. Paul uses, 2Tim 1:6, for stirring up the gift of God. The passage at once shows the debilitated state of the venerable patriarch, and the wonderful effect the news of Joseph's preservation and glory had upon his mind.