Sir, When To Inject After Rat Bit? What Injection Is

sir, when to inject after rat bit? what injection is required.
sir, on Saturday at 12:20 AM, I was bitten by the rat on my right palm. immediately I seek medical help but there was no injection... they asked me to city hospital... so I could go only on Monday morning which is more than 24 hours... some of my friend said that injection should be used before 24 hours if not it is of no use there is likely to get rabies ... please can you suggest me your word of wisdom... soon..