The Messenger of Allah ﷺ used to divide his time equally and said: O Allah, this is my division concerning what I control, so do not blame me concerning what You control and I do not. Abu Dawud said: By it meant the heart. (Using translation from Abū Dāʾūd 2134)  

كَانَ رَسُولُ اللَّهِ ﷺ يَقْسِمُ فَيَعْدِلُ وَيَقُولُ «اللَّهُمَّ هَذِا قَسْمِي فِيمَا أَمْلِكُ فَلَا تَلُمْنِي فِيمَا تَمْلِكُ وَلَا أَمْلِكُ»