Hadith 1:96
Isnād Da'īf (Zubair `Aliza'i)
Abu Musa reported that God’s messenger said, “The heart is like a feather in desert country which the winds keep turning over and over.” Ahmad transmitted it.
وَعَنْ أَبِي مُوسَى قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَثَلُ الْقَلْبِ كَرِيشَةٍ بِأَرْضِ فَلَاةٍ يُقَلِّبُهَا الرِّيَاحُ ظَهْرًا لِبَطْنٍ» . رَوَاهُ أَحْمد
Original Reference: Mishkat al-Masabih 103