Narrated Umm Salamah, Ummul Muminin: The Messenger of Allah ﷺ taught me to say when the adhan for the sunset prayer was called; "O Allah, this is the time when Thy night comes on, Thy day retires, and the voices of Thy summoners are heard, so forgive me. "
Hadith Referenceسنن ابي داود / كتاب الصلاة / 530
Hadith Gradingالألبانی:ضعيف | زبیر علی زئی:إسناده حسن, مشكوة المصابيح (669), أبو كثير مولٰي أم سلمة حسن الحديث وثقه الحاكم والذھبي، والمسعودي حدث به قبل اختلاطه
´Umm Salamah said:` “The Messenger of Allah (ﷺ) taught me, saying: ‘Say: “O Allah, this is the coming of Your night, and the departing of Your day, the voices of those calling to You, and the time of prayers to You, I ask You to forgive me (Allāhumma hādhastiqbālu lailika, wastidbāru nahārika, wa aṣwātu du`ātika wa ḥuḍūru ṣalawātika, as’aluka an taghfira lī).”
Shaykh Dr. Abdur Rahman Freywai
Explanation: 1: O Allah! This is the time of Your night’s arrival and the departure of Your day, and it is the time of voices raised in Your remembrance and of coming to Your prayer. At such a time, I ask You for my forgiveness.
Note: (In the chain of narration, Abu Kathir is a narrator who is lenient in hadith [i.e., not strong in reliability].)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 3589