I saw that the Prophet ﷺ placed his knees (on the ground) before placing his hands when he prostrated himself. And when he stood up, he raised his hands before his knees. (Using translation from Abū Dāʾūd 838)  

«رَأَيْتُ النَّبِيَّ ﷺ إِذَا سَجَدَ وَضْعَ رُكْبَتَيْهِ قَبْلَ يَدَيْهِ وَإِذَا نَهَضَ رَفَعَ يَدَيْهِ قَبْلَ رُكْبَتَيْهِ»