The Prophet (ﷺ) said: May Allah show mercy to a man who prays four rak’ahs before the afternoon prayer. (Translation from sunnah.com)
1. Imam Ahmad Shakir Rahimahullah: A Saheeh Chain.
[عن عبدالله بن عمر:] رحِم اللهُ امرأً صلى قبلَالعصرِ أربعًا
2. Imam Abdul Azeez bin Abdullah bin Baaz Rahimahullah: A Saheeh Chain.
[عن عبدالله بن عمر:] رحم اللهُ امرأً صلّى قبلالعصرِ أربعًا.
3. Shaikh Shuaib Al-Arnaut Rahimahullah: A Hasan Chain.
[عن عبد الله بن عمر:] رحِم اللهُ امرأً صلّى قبْلَالعصرِ أربعًا
4. Imam Al-Mundhiri (656 AH, the earliest amongst all the scholars mentioned here) Rahimahullah: The chain is Saheeh or Hasan or close to both of them.
[عن عبدالله بن عمر:] رحمَ اللَّهُ امرأً صلّى قبلَالعَصرِ أربعًا
Source: Sunnah.one Hadith search software/app.