Anas bin Malik reported,

Anas said, "I never saw anyone more compassionate to children than the Messenger of Allah ﷺ." He said, "Ibrahim had a wet-nurse in the upper part of Madinah. The Prophet ﷺ would set out, and we would go with him, and he would enter the house, which would be filled with smoke, for the wet-nurse's husband was a blacksmith. He would pick Ibrahim up and kiss him, then return."Amr said, "When Ibrahim died, the Messenger of Allah ﷺ said, 'Ibrahim is my son. He died while still nursing, and he has two wet-nurses who will complete his nursing in Paradise.'"

عن أنس بن مالك قال

ما رأيت أحدا كان أرحم بالعيال من رسول الله ﷺ قال: كان إبراهيم مسترضعا له في عوالي المدينة، فكان ينطلق ونحن معه، فيدخل البيت، وإنه ليدخن، وكان ظئره قينا، فيأخذه فيقبله، ثم يرجع. قال عمرو: فلما توفي إبراهيم قال رسول الله ﷺ: إن إبراهيم ابني، وإنه مات في الثدي، وإن له لظئرين تكملان رضاعه في الجنة.