Hadithcore
Mishkat al-Masabih, 619

Umm Salama said, “God’s Messenger observed the noon prayer much earlier than you, but you observe the afternoon prayer much earlier than he.” Ahmad and Tirmidhi transmitted it.

وَعَنْ أُمِّ سَلَمَةَ قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَشَدَّ تَعْجِيلًا لِلظُّهْرِ مِنْكُمْ وَأَنْتُمْ أَشَدُّ تَعْجِيلًا لِلْعَصْرِ مِنْهُ. رَوَاهُ أَحْمد وَالتِّرْمِذِيّ

References1 variant
In-Book Reference
Book 4, Hadith 53