Reference: Siyar A’laam an-Nubalaa v4 p21
said:
at-Tawakkul (having a good expectation and trust) upon Allaah [alone] is the culmination of [one’s] eemaan.
And he would supplicate [to Allaah, saying]:الَّلهُمَّ إِنِّي أَسْأَلُكَ صِدْقَ التَّوَكُّلِ عَلَيْكَ وَ حُسْنَ الظَّنِّ بِكَ
O Allaah, indeed I ask You [to bless me with] sincere reliance upon You and a good expectation of You.
