Matthew 18:2

Called to him (proskalesameno). Indirect middle voice aorist participle. It may even be Peter's "little child" (paidion) as it was probably in Peter's house ( Mark 9:33 ). Set him (esthsen). Transitive first aorist active indicative, not intransitive second aorist, esth. In the midst of them (en meswi autwn). Luke adds ( Luke 9:47 ) "by his side" (par eautwi). Both are true.