Jabir bin Samurah (May Allah be pleased with him) reported:
After the Fajr (dawn) prayer the Prophet (ﷺ) used to sit crossed legged in the same place in which he had prayed till the sun shone brightly.[Abu Dawud]. (JA)
App reference (JA): Book 5, Hadith 8 (JA)
Arabic/English book reference (JA): Book 5, Hadith 821 (JA)