Then the Holy Prophet(sa) states:
“Long lasting patience and steadfastness is required in prayer and an individual who does not show impatience, ultimately receives the fruit of his prayer. However, if he begins to tire and say that, ‘I have prayed much, but Allāh has not heard me’ and then with this thought, he abandons prayer all together, then in actuality, the prayer of such an individual is not accepted.”2
1 Ṣaḥīḥul-Bukhārī, Kitābud-Da‘awāt, Bābu Yustajābu Lil-‘Abdi Mā Lam Ya‘jal, Ḥadīth No. 6340
Musnad, By Imām Aḥmad bin Ḥanbal, Volume 3, p. 442, Musnadu Abī Hurairah, Ḥadīth No. 9137, ‘Ālamul-Kutub, Beirut (1998)
2 Ṣaḥīḥu Muslim, Kitābudh-Dhikri Wad-Du‘ā’i..., Bābu Annahū Yustajābu Lid-Dā‘ī Mā Lam Ya‘jal..., Ḥadīth No. 6936