"إذا قام أحدكم من الليل فليفتتح الصلاة بركعتين خفيفتين"
Abu Hurairah (May Allah be pleased with him) reported: The Prophet (ﷺ) said, "When one of you gets up at night to perform (Tahajjud) prayer, let him start Salat with two short Rak'ah." [Muslim] .