Markus 14:13

14:13 He sent two of his disciples and told them, “Go into the city, and a man carrying a jar ¹  of water will meet you. Follow him.

[14:13]  ¹ sn Since women usually carried these jars, it would have been no problem for the two disciples (Luke 22:8 states that they were Peter and John) to recognize the man Jesus was referring to.