You should have prayed and then fed him.

Nothing will happen to him if he cries for a while.

Breast feeding while praying is not permissible as this would involve exposing part of your body and it would require a lot of movement.

And Allah knows best

Sheikh, I have a new alarm clock and this morning at Fajr time I didn’t hear it ringing. I woke up with few minutes before sunrise, because my son was crying and it was the time to breastfed.So he was loudly crying and I just took him and started breastfeeding, but while I was doing this I could see the Sun more and more, and losing my prayer. What was I supposed to do? To let him cry and go pray? Or to finish feeding him and then pray?or should I breastfeeding him while praying?To know, if it will be happen again…