For they still did not understand from the Scripture that Jesus had to rise from the dead.
Berean Standard Bible (BSB)
For as yet they didn’t know the Scripture, that he must rise from the dead.
World English Bible (WEB)
For{G1063} as yet{G3764} they knew{G1492}{(G5715)} not{G3764} the scripture{G1124}, that{G3754} he{G846} must{G1163}{(G5748)} rise again{G450}{(G5629)} from{G1537} the dead{G3498}.
Strong's King James
(9) Because not yet had they understood the Writing that it's necessary, He rise up standing from death.
The F.O.G
The F.O.G Message
for not yet did they know the Writing, that it behoveth him out of the dead to rise again.
Young's Literal Translation