Imam Ibn Qayyim rahimahullah said:

أَنَّ الثِّقَةَ خُلَاصَةُ التَّوَكُّلِ وَلُبُّهُ

“That confidence in Allah is the conclusion of Tawwakul and its core”

And then he mentions a great example of it:

“He brought in this chapter His statement, the Exalted of Umm Musa:

فَإِذَا خِفْتِ عَلَيْهِ فَأَلْقِيهِ فِي الْيَمِّ وَلَا تَخَافِي وَلَا تَحْزَنِي

When you fear for him, then cast him into the river and fear not, nor grieve

[28:7]

For verily what she did here is the very essence of having confidence in Allah, the Exalted. If it was not for the completeness of her confidence in Allah, she would not have thrown her child, her prized possession in the stream of water to be played with by the waves and current to where it would land or stop”.

[Madaarij as-Salikeen (2/142)]

Translated by

Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan