Regarding sitting party in the sun and party in the shade
حَدَّثَنَا ابْنُ السَّرْحِ، وَمَخْلَدُ بْنُ خَالِدٍ، قَالاَ حَدَّثَنَا سُفْيَانُ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، قَالَ حَدَّثَنِي مَنْ، سَمِعَ أَبَا هُرَيْرَةَ، يَقُولُ قَالَ أَبُو الْقَاسِمِ صلى الله عليه وسلم " إِذَا كَانَ أَحَدُكُمْ فِي الشَّمْسِ " . وَقَالَ مَخْلَدٌ " فِي الْفَىْءِ " . " فَقَلَصَ عَنْهُ الظِّلُّ وَصَارَ بَعْضُهُ فِي الشَّمْسِ وَبَعْضُهُ فِي الظِّلِّ فَلْيَقُمْ " .
Narrated AbuHurayrah: AbulQasim (ﷺ) said: When one of you is in the sun (Shams)--Makhlad's version has "fay'"--and the shadow withdraws from him so that he is partly in sun and partly in shade, he should get up.