Al-Kāfi

Hadith 1024
worship
3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ ذَرِيحٍ الْمُحَارِبِيِّ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) مَتَى أُصَلِّي الظُّهْرَ فَقَالَ صَلِّ الزَّوَالَ ثَمَانِيَةً ثُمَّ صَلِّ الظُّهْرَ ثُمَّ صَلِّ سُبْحَتَكَ طَالَتْ أَوْ قَصُرَتْ ثُمَّ صَلِّ الْعَصْرَ.
3. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Dharih al-Muharibiy who has narrated the following: “I once asked abu ‘Abd Allah (a.s.), ‘When can I perform al-Dhuhr Salah (prayer)?’ He (the Imam) said, ‘Perform the eight Rak‘at (the optional Salah (prayer) when the sun declines (toward the west at noontime), then perform al-Dhuhr. Thereafter perform your optional Salah (prayer) for a longer or short time, then perform al-‘Asr Salah (prayer).”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī