Ayesha reported,

By the One who took him, he did not abandon those two until he met Allah, and he did not meet Allah Almighty until he had grown too heavy to stand in prayer, performing much of his prayer while seated. She meant the two rak'ahs after Asr. The Prophet ﷺ used to pray them, but he would not pray them in the mosque, fearing it would become a burden on his community, for he loved whatever made things easier for them.

حدثنا أبو نعيم قال حدثنا عبد الواحد بن أيمن قال حدثني أبي أنه سمع

عائشة قالت

والذي ذهب به ما تركهما حتى لقي الله وما لقي الله تعالى حتى ثقل عن الصلاة وكان يصلي كثيرا من صلاته قاعدا تعني الركعتين بعد العصر وكان النبي ﷺ يصليهما ولا يصليهما في المسجد مخافة أن يثقل على أمته وكان يحب ما يخفف عنهم