You may not use the exact phrase, but when more fluent you may read, hear or use those words in similar context. Each part of the sentence is familiar to me from prior use.
An example of a situation could be: you were taking your 3 young children to the zoo. Having fun in the zoo, your children were scattered in different parts of the zoo. The zookeeper informed you that the monkey show would begin shortly and advised that you "call and gather your children" to go to the show.