Mark 10:15
Most certainly I tell you, whoever will not receive God’s Kingdom like a little child, he will in no way enter into it.”
World English Bible (Public Domain)
In context
Before · Mark 10:13–14
13They were bringing to him little children, that he should touch them, but the disciples rebuked those who were bringing them. 14But when Jesus saw it, he was moved with indignation and said to them, “Allow the little children to come to me! Don’t forbid them, for God’s Kingdom belongs to such as these.
15Most certainly I tell you, whoever will not receive God’s Kingdom like a little child, he will in no way enter into it.”