رَبُّ ٱلۡمَشۡرِقَيۡنِ وَرَبُّ ٱلۡمَغۡرِبَيۡنِ (٥٥:١٧)

The Lord of the two Easts [sunrises] and The Lord of the two Wests [sunsets] (55:17).

Correlating Hadith

Imam al-Sadiq [when asked about the verse] said: "The two Easts are the Messenger of Allah and the Commander of the Faithful [Imam Ali], and the two Wests are [Imam] Hasan and [Imam] Hussain."

امام الصادق: رَبُّ الْمَشْرِقَیْنِ وَ رَبُّ الْمَغْرِبَیْنِ، قَالَ الْمَشْرِقَیْنِ رَسُولُ اللَّهِ (صلی الله علیه و آله) وَ أَمِیرُ الْمُؤْمِنِینَ (علیه السلام) وَ الْمَغْرِبَیْنِ الْحَسَنُ وَ الْحُسَیْنُ (علیها السلام)

Sources

Bihar al-Anwar, vol. 24, pg. 80; Tafsir al-Qummi, vol. 5, pg. 57.

تفسیر اهل بیت علیهم السلام ج15، ص400 /بحارالأنوار، ج24، ص69/ القمي، ج2، ص: البرهان/ نورالثقلین