Al-Kāfi

Hadith 1659
dua
4ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ جَمِيلِ بْنِ دَرَّاجٍ عَنْ عَبْدِ الله بْنِ عَطَاءٍ عَنْ أَبِي جَعْفَرٍ (عَلَيهِ السَّلام) قَالَ كَانَ أَبِي إِذَا كَانَتْ لَهُ إِلَى الله حَاجَةٌ طَلَبَهَا فِي هَذِهِ السَّاعَةِ - يَعْنِي زَوَالَ الشَّمْسِ.
4. Ali Ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Jamil Ibn Darraj from Abdullah Ibn 'Ata that Abu Ja'far (al-Baqir) (as) said: "When my father had a need before Allah (swt), he would ask Him during this hour." - meaning declining of the sun from its peak position (i.e., dhuhr time).
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī