The Codex Bezae adds "as Peter and John went out." {As he
held} (kratountos autou). Genitive absolute of krate(935c), to
hold fast, with accusative rather than genitive to get hold of
( Ac 27:13 ). Old and common verb from kratos (strength,
force). Perhaps out of gratitude and partly from fear ( Lu
8:38 ). {In the porch that is called Solomon's} (epi t(8869) sto(8369)
t(8869) kaloumen(8869) Solom(936e)tos). The adjective Stoic (stoikos) is
from this word stoa (porch). It was on the east side of the
court of the Gentiles (Josephus, _Ant_. XX. 9, 7) and was so
called because it was built on a remnant of the foundations of
the ancient temple. Jesus had once taught here ( Joh 10:23 ).
{Greatly wondering} (ekthamboi). Wondering out of (ek)
measure, already filled with wonder (	hambous, verse  10 ).
Late adjective. Construction according to sense (plural, though
laos singular) as in  5:16  6:7  11:1 , etc.