(As-Swaffaath) 37 : 112
وَبَشَّرْنَاهُ بِإِسْحَاقَ نَبِيًّا مِنَ الصَّالِحِينَ
And We informed him glad tidings with Ishaque, a Prophet among the righteous.
When Messenger Ibrahim was ready to sacrifice his first son, Ismael, he received glad tidings of a son, Ishaq, through his wife Sara, who was barren. See explanation 11: 71; 15: 53; 51: 28-30.