Abdullah bin Abbas reported,

The Prophet ﷺ took one of his daughters who was dying and held her close, placing her between his breast. She passed away while resting against his chest.Umm Ayman cried out, and someone said to her, "Are you weeping in the presence of the Messenger of Allah?"She replied, "Do I not see you weeping, Messenger of Allah?"He said, "I am not weeping. This is mercy. The believer is in a state of goodness in every condition. Even as his soul departs from between his sides, he is praising Allah ."

عن ابن عباس قال

أخذ النبي ﷺ بنتا له تقضي، فاحتضنها، فوضعها بين ثدييه فماتت وهي بين ثدييه، فصاحت أم أيمن فقيل: أتبكي عند رسول الله؟ قالت: ألست أراك تبكي يا رسول الله؟ قال: لست أبكي، إنما هي رحمة، إن المؤمن بكل خير على كل حال، إن نفسه تخرج من بين جنبيه، وهو يحمد الله عز وجل.