[Machine] I brought the Prophet ﷺ some milk, and he said: "Why don't you pour some yogurt into it, even if you only dab it with wood?"  

أَتَيْتُ رَسُولَ اللَّهِ ﷺ بِلَبَنٍ فَقَالَ أَلَا خَمَّرْتَهُ وَلَوْ تَعْرِضُ عَلَيْهِ عُودًا  

“The Messenger of Allah ﷺ commanded us to cover our vessels, tie up our water skins and turn over our vessels.” (Using translation from Ibn Mājah 3411)   

أَمَرَنَا رَسُولُ اللَّهِ ﷺ بِتَغْطِيَةِ الْوَضُوءِ وَإِيكَاءِ السِّقَاءِ وَإِكْفَاءِ الْإِنَاءِ