‘Abdallah b. as-Sa’ib said God’s Messenger used to pray four <i>rak'as</i> before the noon prayer, after the sun had passed the meridian, saying, “It is an hour at which the gates of heaven are opened, and I like a good deed of mine to ascend at that time.” Tirmidhi transmitted it.

وَعَنْ عَبْدِ اللَّهِ بْنِ السَّائِبِ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم يُصَلِّي أَرْبَعًا بَعْدَ أَنْ تَزُولَ الشَّمْسُ قَبْلَ الظُّهْرِ وَقَالَ: «إِنَّهَا سَاعَةٌ تُفْتَحُ فِيهَا أَبْوَابُ السَّمَاءِ فَأُحِبُّ أَنْ يَصْعَدَ لِي فِيهَا عَمَلٌ صَالِحٌ» . رَوَاهُ التِّرْمِذِيّ