The recommended condition for the imam to be in if he goes out
أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ عَبْدِ الرَّحْمَنِ، عَنْ سُفْيَانَ، عَنْ هِشَامِ بْنِ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ كِنَانَةَ، عَنْ أَبِيهِ، قَالَ أَرْسَلَنِي فُلاَنٌ إِلَى ابْنِ عَبَّاسٍ أَسْأَلُهُ عَنْ صَلاَةِ، رَسُولِ اللَّهِ صلى الله عليه وسلم فِي الاِسْتِسْقَاءِ فَقَالَ خَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم مُتَضَرِّعًا مُتَوَاضِعًا مُتَبَذِّلاً فَلَمْ يَخْطُبْ نَحْوَ خُطْبَتِكُمْ هَذِهِ فَصَلَّى رَكْعَتَيْنِ .
It was narrated from Hisham bin Ishaq bin Abdullah bin Kinanah that : His father said: "So and so sent me to ask him how the Messenger of Allah (ﷺ) prayed for rain (Istisqa')." He said: 'The Messenger of Allah (ﷺ) went out beseeching and humble, (dressed) in a state of humility. He did not give a Khutbah like this Khutbah of yours, and he prayed two rak'ahs.'"