﴿ قَالُوا۟ بَشَّرْنَٰكَ بِٱلْحَقِّ فَلَا تَكُن مِّنَ ٱلْقَٰنِطِينَ ﴾

“They answered: "We have given thee the glad tiding of something that is bound to come true. - so be not of those who abandon hope!"”

(They said: We bring thee good tidings in truth) that you will have a son. (So be not thou of the despairing) in relation to having a son.