Sahih Bukhari Volume 2, Book 16, Hadith 1057

ثُمَّ رَكِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم ذَاتَ غَدَاةٍ مَرْكَبًا، فَكَسَفَتِ الشَّمْسُ فَرَجَعَ ضُحًى، فَمَرَّ رَسُولُ اللَّهِ صلى الله عليه وسلم بَيْنَ ظَهْرَانَىِ الْحُجَرِ، ثُمَّ قَامَ فَصَلَّى، وَقَامَ النَّاسُ وَرَاءَهُ، فَقَامَ قِيَامًا طَوِيلاً، ثُمَّ رَكَعَ رُكُوعًا طَوِيلاً، ثُمَّ رَفَعَ فَقَامَ قِيَامًا طَوِيلاً، وَهْوَ دُونَ الْقِيَامِ الأَوَّلِ، ثُمَّ رَكَعَ رُكُوعًا طَوِيلاً، وَهْوَ دُونَ الرُّكُوعِ الأَوَّلِ، ثُمَّ رَفَعَ فَسَجَدَ سُجُودًا طَوِيلاً ثُمَّ قَامَ فَقَامَ قِيَامًا طَوِيلاً، وَهْوَ دُونَ الْقِيَامِ الأَوَّلِ، ثُمَّ رَكَعَ رُكُوعًا طَوِيلاً، وَهْوَ دُونَ الرُّكُوعِ الأَوَّلِ، ثُمَّ قَامَ قِيَامًا طَوِيلاً، وَهْوَ دُونَ الْقِيَامِ الأَوَّلِ، ثُمَّ رَكَعَ رُكُوعًا طَوِيلاً، وَهْوَ دُونَ الرُّكُوعِ الأَوَّلِ، ثُمَّ سَجَدَ وَهْوَ دُونَ السُّجُودِ الأَوَّلِ، ثُمَّ انْصَرَفَ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم مَا شَاءَ اللَّهُ أَنْ يَقُولَ، ثُمَّ أَمَرَهُمْ أَنْ يَتَعَوَّذُوا مِنْ عَذَابِ الْقَبْرِ

Then one day Allah's Apostle rode (to leave for some place) but the sun eclipsed. He returned on the forenoon and passed through the rear of the dwellings (of his wives) and stood up and started offering the (eclipse) prayer and the people stood behind him. He stood for a long period and then performed a long bowing and then stood straight for a long period which was shorter than that of the first standing, then he performed a prolonged bowing which was shorter than the first bowing, then he raised his head and prostrated for a long time and then stood up (for the second Raka) for a long while, but the standing was shorter than the standing of the first Raka. Then he performed a prolonged bowing which was shorter than that of the first one. He then stood up for a long time but shorter than the first, then again performed a long bowing which was shorter than the first and then prostrated for a shorter while than that of the first prostration. Then he finished the prayer and delivered the sermon and) said what Allah wished; and ordered the people to seek refuge with Allah from the punishment of the grave.