Abu Qilabah reported: A man entered the home of Salman, may Allah be pleased with him, while he was kneading dough. The man said, “What is this?” Salman said, “We sent out the servant on an errand and we dislike for him to have two tasks at once.”
Source: Ḥilyat al-Awliyā’ 657
عَنْ أَبِي قِلابَةَ أَنَّ رَجُلا دَخَلَ عَلَى سَلْمَانَ رضي الله عنه وَهُوَ يَعْجِنُ فَقَالَ مَا هَذَا فَقَالَ بَعَثْنَا الْخَادِمَ فِي عَمَلٍ فَكَرِهْنَا أَنْ نَجْمَعَ عَلَيْهِ عَمَلَيْنِ
657 حلية الأولياء لأبي نعيم