minimum age for marriage

alsalamu alaykom wa rahamt allah wa barakato. . Im dolng research on khomeinis life and it is said in one of his books : ” A man can have sexual pleasure with a child EVEN if its still a suckling baby”
what does ahl alsunna wal jamaat say about a man asking for a suckling babies hand for real marriage from her father , is it lawful ? If not what is the agreed minimum age for marriage for both male and female in Islam ? Thank You