A man who conveys a greeting to another: what does he say to him?

Ghalib said: We were sitting at the door of al-Hasan al-Basri when a man came and said: My father narrated from my grandfather that he said: My father sent me to the Messenger of Allah (peace and blessings be upon him) and said: Go to him (peace and blessings be upon him) and convey my salam to him (peace and blessings be upon him). So I came to him (peace and blessings be upon him) and said: My father sends you (peace and blessings be upon him) his salam. He (peace and blessings be upon him) said: "Wa alayka wa ala abika as-salam. Upon you and upon your father be peace."

Muhammad bin Abi al-Mujalid said: I said to Sayyiduna Ibn Abi Awfa (may Allah be pleased with him): "Your nephews have conveyed salam to you, and then the people of the mosque as well." He replied: "Wa 'alayka wa 'alayhim (and upon you and upon them)."

Al-Aswad said: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said to me: "When you meet Sayyiduna Umar (may Allah be pleased with him), or he said something similar, convey salam to him." The narrator said: When I met him, I conveyed salam to him. He replied thus: "'Alayhi, or 'Wa 'alayhi', al-salam wa rahmatullah (upon him be peace and the mercy of Allah)."

Sayyidah Aishah (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) said to me: "Indeed, Jibril conveys salam to you." She replied thus: "Wa 'alayhi al-salam wa rahmatullah (and upon him be peace and the mercy of Allah)."

Ibn Awn said: When Muhammad (Ibn Sirin) was told, "So-and-so has conveyed salam to you," he would reply thus: "Wa 'alayka wa 'alayhi al-salam (and upon you and upon him be peace)."