Sayyiduna al-Zubayr narrates: We used to offer the Friday prayer behind the Prophet (peace and blessings be upon him), then when we went back we would try to get into the shade, but we would find no shade except a space just enough to shade our feet. In one narration the words are: We found no shade except the place of our feet (which was shaded).
Ahmad and Abu Ya'la recorded something similar; its chain contains a man who is not named.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 3112