{When they had fulfilled the days} (	elei(9373)ant(936e) tas
h(886d)eras). Genitive absolute again, but aorist participle
(effective aorist). "The days" may mean the full seven days ( Ex
12:15f.  Le 23:6-8  De 16:3 ), or the two chief days after which
many pilgrims left for home. {As they were returning} (en t(9369)
hupostrephein antous). The articular infinitive with en, a
construction that Luke often uses ( 1:21  2:27 ). {The boy,
Jesus} (I(8873)ous ho pais). More exactly, "Jesus the boy." In
verse  40  it was "the child " (	o paidion), here it is "the
boy" (ho pais, no longer the diminutive form). It was not
disobedience on the part of "the boy" that made him remain
behind, but intense interest in the services of the temple;
"involuntary preoccupation" (Bruce) held him fast.