I heard the apostle of Allah ﷺ say: A man returns after saying his prayer while a tenth part of his prayer, or a ninth part, or an eight part, or a seventh part, or a sixth part, or a fifth part, or a third part, or half of it, is recorded for him. (Using translation from Abū Dāʾūd 796)
"إِنَّ الرَّجُلَ لَيَنْصَرِفُ، وَمَا كُتِبَ لَهُ إِلّا عَشْرُ صَلاته تُسْعُها، ثمنُها ، سُبْعها، سُدُسُها خُمْسُها رُبُعُها، ثُلُثُها، نِصْفُهَا".