I said that on that day so that Allah might carry out His decree upon me(1).

This is a good, authentic, and unique hadith.

3686 - Abu Sa'id al-Ashajj narrated to us, saying: 'Uqbah ibn Khalid narrated to us, from Abu Sa'd Sa'id ibn al-Marzuban, from Abu Salamah, from Thawban, who said: The Messenger of Allah, peace and blessings be upon him, said: "Whoever says when evening comes: 'I am pleased with Allah as Lord, with Islam as religion, and with Muhammad as Prophet,' it is incumbent upon Allah to make him pleased"(2).

This is a good and unique hadith from this chain of transmission.

3687 - Sufyan ibn Waki' narrated to us, saying: Jarir narrated to us, from al-Hasan ibn 'Ubaydillah, from Ibrahim ibn Suwayd, from 'Abd al-Rahman ibn Yazid, from 'Abdullah, who said: When the Prophet, peace and blessings be upon him, reached evening, he would say: "We have reached evening, and the dominion belongs to Allah, and praise belongs to Allah; there is no god but Allah alone, with no partner." I think he said: "To Him belongs the dominion, and to Him belongs praise, and He is over all things competent."

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(1) A good hadith, and it was narrated by Abu Dawud (5088) and (5089), Ibn Majah (3869), and al-Nasa'i in "Amal al-Yawm wa al-Laylah" (15), (16), (346), and (347), and it is in "al-Musnad" (446), and "Sahih Ibn Hibban" (852) and (862).
(2) Authentic due to corroborating evidence, and this chain of transmission is weak due to the weakness of Abu Sa'd Sa'id ibn al-Marzuban. It has a supporting witness from the hadith of the servant of the Prophet, peace and blessings be upon him, in Ahmad (18967), and its chain is weak. And another from the hadith of Abu Sa'id al-Khudri, also in Ahmad (11102), and it is an authentic hadith.