Sayyiduna Abdullah (may Allah be pleased with him) says about "until the darkening of the night": What is meant by it is the Isha prayer.
The chain of this report contains a narrator, Jabir bin Yazid al-Ju'fi, and he is da'if (weak); Shu'bah and Sufyan declared him thiqah (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 1742