[Machine] The Prophet ﷺ used to pray four units before noon prayer, when the sun starts to decline. So I asked, "O Messenger of Allah, what is this prayer?" He said, "Indeed, the gates of heaven are opened when the sun starts to decline, until the noon prayer is performed. And I love for a righteous deed to be lifted to me in these units of prayer."
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي أَرْبَعَ رَكَعَاتٍ قَبْلَ الظُّهْرِ حِينَ تَزُولُ الشَّمْسُ فَقُلْتُ يَا رَسُولَ اللهِ مَا هَذِهِ الصَّلَاةُ؟ قَالَ «إِنَّ أَبْوَابَ السَّمَاءِ تُفْتَحُ عِنْدَ زَوَالِ الشَّمْسِ حَتَّى يُصَلَّى الظُّهْرُ وَإِنِّي لَأُحِبُّ أَنْ يُرْفَعَ لِي فِيهِنَّ عَمَلٌ صَالِحٌ»