From Imam Bukhari’s Adab al Mufrad:

973. ‘Abdu’r-Rahman ibn Razin said, “We passed by az-Zubda and were told, ‘There is Salama ibn al-Akwa’. I went to him and he greeted us. Then he brought out his hands and stated, ‘With these two hands I offered allegiance to the Messenger of Allah, may Allah bless him and grant him peace.’ He held out his palm which was as huge as a camel’s foot, and we got up and kissed it.”

974. Anas was asked, “Did you touch the Prophet, may Allah bless him and grant him peace, with your hand?” He replied, “Yes,” so they kissed it.

From various texts about Ottoman culture and its incorporation of this practice:

As Turkish society values respect toward elders, elderly people are turned to for their wisdom and highly respected. In fact, the custom of kissing the hand of elderly people and putting it to one’s forehead as a symbol of respect is still common in Turkey.
ph 156
International Perspectives on Family Violence and Abuse: A Cognitive Ecological Approach
By Kathleen Malley-Morrison
Published by Taylor & Francis, 2004

The relations between the various members of an Osmanli household, and the deference from younger people towards their seniors required by family etiquette, may appear somewhat curious to Europeans. They are, however, the necessary outcome of the patriarchal system which has obtained among all the nationalities of Turkey, and has only of recent years been to a certain extent abandoned by the Christian element in the seaboard towns of the ^Egean. According to the customary laws of this ancient social system, if a man’s widowed mother reside permanently under his roof, which is not unusual, his wife’s position in the house is but secondary, and she is required to defer to her mother- in-law in all things. Hand-kissing being the usual mode of respectful greeting, the wife kisses the hand of her Kain Validt, as also that of her husband, on the occasion of any family event, or any anniversary, and also on special Moslem holidays, such as the opening of the Bairam festival.
Home Life in Turkey
By Lucy Mary Jane Garnett
Published by The Macmillan company, 1909

The lady of the house, informed of this, hastens to receive her guests with all honour, and should there be more than one daughter, the eldest proceeds to dress and adorn herself for inspection—for among the Turks, as with their Greek neighbours, daughters are married according to seniority. The two mothers meanwhile exchange conventional compliments until the portiere is raised and the maiden enters, and after saluting the strangers by kissing their hands, she offers to each in turn a cup of coffee from the tray which has been brought in at the same time by a slave. While this is being partaken of, she stands in modest attitude, and after receiving the empty cups salaams and vanishes.
Home Life in Turkey pg 238
By Lucy Mary Jane Garnett
Published by The Macmillan company, 1909

Both husband and wife salute the bridegroom’s parents by kissing their hands, and receive the customary presents from them in return. At noon a grand reception is held, called the “Feast of Sheep’s Trotters,” from the dish which it is customary for the couple to partake of on this occasion.

pg 489 The Women of Turkey and Their Folk-lore
By Lucy Mary Jane Garnett, John S. Stuart-Glennie
Published by D. Nutt, 1891