عن زيد بن أرقم رضي الله عنه
أنه رأى قومًا يصلون من الضحى، فقال: أما لقد علموا أن الصلاة في غير هذه الساعة أفضل، إن رسول الله صلى الله عليه وسلم قال: «صلاة الأوابين حين ترمض الفصال»
I saw some people performing Duha (prayers) in the early forenoon and warned them (saying): These people must know that performing Salat a little later is better. The Messenger of Allah (sallallahu alayhi wa sallam) said, “The Salat of the penitent is to be observed when the young ones of camels feel the heat of the sun (i.e., when it becomes very hot).”.
Riyad as-Salihin 1143, Book 9, The Book of Virtues, Hadith 153. 1 min read