Which preposition to use with genuflections

before Occurrences 1%

In the twilight, figures in black cloaks glided by on their way to the sacristy, stopping to make genuflections before each image; and in the distance, invisible in the darkness, you could still divine the presence of the bell-ringer, like a restless hobgoblin, by the rattle of his bunch of keys and the creaking of the doors he opened on his round.

of Occurrences 1%

With what grace he was imitating the mannerisms and genuflections of the chief priest!...

Which preposition to use with  genuflections