Weak
Sunan an-Nasa'i 518
'Are you not going to pray?' He said: 'The Messenger of Allah (ﷺ) said: 'There is no prayer after 'Asr until the sun has set, nor after Subh until the sun has risen.'"
" لاَ صَلاَةَ بَعْدَ الْعَصْرِ حَتَّى تَغِيبَ الشَّمْسُ وَلاَ بَعْدَ الصُّبْحِ حَتَّى تَطْلُعَ الشَّمْسُ "