It is narrated about Sayyiduna Zaid bin Arqam. He saw some people performing prayer at the time of Duha in the Mosque of Quba, so he said: These people know that performing prayer at a time other than this is more virtuous. The Prophet Muhammad (peace be upon him) said: "The prayer of the righteous is at the time when the sand becomes hot for the (camel) calves."
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2539
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما