# General Information:

Moses speaks to the Israelites as if they were one man, so all instances of "you" and "your" are singular. 

# him will you worship

"he is the one you must worship"

# To him you must cling

"You must rely on him" or "He is the one you must rely on" 

# by his name will you swear

"you will swear and ask Yahweh to confirm it" or "when you swear you will speak his name"