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 رَسُولَ اللهِ ﷺ إِذَا سَجَدَ وَضْعَ رُكْبَتَيْهِ قَبْلَ يَدَيْهِ وَإِذَا نَهَضَ رَفَعَ يَدَيْهِ قَبْلَ رُكْبَتَيْهِ»  

[Machine] The Messenger of Allah, ﷺ , said, "One of you may unintentionally break his prayer and bless as a camel does." And he said another time, "One of you may unintentionally break his prayer and bless as a camel does."  

قال رَسُولُ اللهِ ﷺ «يَعْمِدُ أَحَدُكُمْ فِي صَلَاتِهِ فَيَبْرُكُ كَمَا يَبْرُكُ الْجَمَلُ» وَقَالَ مَرَّةً أُخْرَى يَعْمِدُ أَحَدُكُمْ فَيَبْرِكُ فِي صَلَاتِهِ بَرْكَ الْجَمَلِ  

"The Messenger of Allah ﷺ said: 'When one of you prostrates, let him put his hands down before his knees, and not kneel like a camel.'" (Using translation from Nasāʾī 1091)  

قَالَ رَسُولُ اللهِ ﷺ «إِذَا سَجَدَ أَحَدُكُمْ فَلْيَضَعْ يَدَيْهِ قَبْلَ رُكْبَتَيْهِ وَلَا يَبْرُكُ بُرُوكَ الْبَعِيرِ»