Abu Hurairah (May Allah be pleased with him) reported:
The Prophet (ﷺ) said, "The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. So, follow a middle course (in worship); if you can't do this, do something near to it and give glad tidings and seek help (of Allah) at morn and at dusk and some part of night".[Al-Bukhari].
Arabic/English book reference: Book 1, Hadith 145